For the purposes of this document, the following terms and definitions apply.
+本文档将使用下列术语和定义。
set of data values as defined in clause
在在本规范
member of one of the types Undefined, Null, Boolean, Number, Symbol, or String as defined in clause
指在
A primitive value is a datum that is represented directly at the lowest level of the language implementation.
+一个原始值直接代表语言实现的最低层次的数据
member of the type Object
+Object类型的成员
An object is a collection of properties and has a single prototype object. The prototype may be the null value.
+对象是属性的集合，并且具有单个原型对象。原型可能是空值。
function object that creates and initializes objects
+创建和初始化对象的函数对象
The value of a constructor's `prototype` property is a prototype object that is used to implement inheritance and shared properties.
+构造器的`prototype`属性值是用来实现继承和共享的一个原型对象。
object that provides shared properties for other objects
+为其他对象提供共享属性的对象
When a constructor creates an object, that object implicitly references the constructor's `prototype` property for the purpose of resolving property references. The constructor's `prototype` property can be referenced by the program expression constructor.prototype, and properties added to an object's prototype are shared, through inheritance, by all objects sharing the prototype. Alternatively, a new object may be created with an explicitly specified prototype by using the `Object.create` built-in function.
当构造器创建一个对象，为了解决对象的属性引用，该对象会隐式引用构造器的`prototype`属性。通过程序表达式_constructor_.prototype可以引用到构造器的“prototype”属性，并且添加到对象原型里的属性，会通过继承与所有共享此原型的对象共享。另外，可使用`Object.create`内置函数，通过明确指定原型来创建一个新对象。
object that has the default behaviour for the essential internal methods that must be supported by all objects
+默认行为拥有如那些所有对象都必须支持的内部方法作的对象
object that does not have the default behaviour for one or more of the essential internal methods
+默认行为缺少一个或多个必要内部方法的对象
Any object that is not an ordinary object is an exotic object.
+任何对象不是普通对象就是异常对象。
object whose semantics are defined by this specification
+其语义由本规范定义的对象
object specified and supplied by an ECMAScript implementation
+ECMAScript实现指定和提供的对象
Standard built-in objects are defined in this specification. An ECMAScript implementation may specify and supply additional kinds of built-in objects. A built-in constructor is a built-in object that is also a constructor.
+标准的内置对象由本规范定义，ECMAScript实现可以指定和定义其他的一个内置构造器是个内置对象，也是个构造器。
primitive value used when a variable has not been assigned a value
+一个在变量没有被赋值时就被使用的原始值
type whose sole value is the *undefined* value
+值只有`undefined`的类型
primitive value that represents the intentional absence of any object value
+表示故意缺省任何对象值的原始值
type whose sole value is the *null* value
+值只有`null`的类型
member of the Boolean type
+Boolean类型的成员
There are only two Boolean values, *true* and *false*.
+只有两个值, `true`和`false`.
type consisting of the primitive values *true* and *false*
+由原始值`true`和`false`组成的类型
member of the Object type that is an instance of the standard built-in `Boolean` constructor
+标准内置构造函数`Boolean`的实例，Object类型成员之一
A Boolean object is created by using the `Boolean` constructor in a `new` expression, supplying a Boolean value as an argument. The resulting object has an internal slot whose value is the Boolean value. A Boolean object can be coerced to a Boolean value.
+通过使用`new`表达式，以一个Boolean值作为参数调用`Boolean`构造器来创建Boolean对象。由此产生的对象包含一个值为此Boolean值的内部属性。一个Boolean对象可以强制转换为Boolean值。
primitive value that is a finite ordered sequence of zero or more 16-bit unsigned integer values
+由零个或多个16位无符号整数组成的有限有序序列原始值
A String value is a member of the String type. Each integer value in the sequence usually represents a single 16-bit unit of UTF-16 text. However, ECMAScript does not place any restrictions or requirements on the values except that they must be 16-bit unsigned integers.
+一个String值是String类型的成员。通常序列中的每个整数值代表UTF-16文本的单个16位单元。然而，对于其值，ECMAScript只要求必须是16位无符号整数，除此之外没有任何限制或要求。
set of all possible String values
+所有可能的String值的集合
member of the Object type that is an instance of the standard built-in `String` constructor
+标准内置构造器`String`实例，Object类型成员之一
A String object is created by using the `String` constructor in a `new` expression, supplying a String value as an argument. The resulting object has an internal slot whose value is the String value. A String object can be coerced to a String value by calling the `String` constructor as a function (
通过使用`new`表达式，以一个String值为参数调用`String`构造器来创建String对象。由此产生的对象包含一个值为此String值的内部属性。将`String`构造器作为一个函数来调用，可将一个String对象强制转换为一个String值(
primitive value corresponding to a double-precision 64-bit binary format IEEE 754-2008 value
+IEEE 754-2008格式的64位双精度二进制的原始值
A Number value is a member of the Number type and is a direct representation of a number.
+一个数字值是数字类型的成员，直接代表一个数字。
set of all possible Number values including the special “Not-a-Number” (NaN) value, positive infinity, and negative infinity
+所有可能的Number值的集合，包括特殊“Not-a-Number” (NaN) 值, 正无穷, 负无穷
member of the Object type that is an instance of the standard built-in `Number` constructor
+标准内置构造器`Number`的一个实例，Object类型成员之一
A Number object is created by using the `Number` constructor in a `new` expression, supplying a number value as an argument. The resulting object has an internal slot whose value is the number value. A Number object can be coerced to a number value by calling the `Number` constructor as a function (
通过使用`new`表达式，以一个数字值为参数调用`Number`构造器来创建Number对象。由此产生的对象包含一个值为此Number值的内部属性。将`Number`构造器作为一个函数来调用，可将一个Number对象强制转换为一个数字值(
number value that is the positive infinite number value
+正无穷数值
number value that is an IEEE 754-2008 “Not-a-Number” value
+值IEEE 754-2008 “Not-a-Number”的数值
primitive value that represents a unique, non-String Object property key
+表示一个唯一的，非字符串的属性键对象的原始值
set of all possible Symbol values
+所有可能的Symbol值集合
member of the Object type that is an instance of the standard built-in `Symbol` constructor
+标准内置构造器`Symbol`的一个实例，Object类型成员之一
member of the Object type that may be invoked as a subroutine
+可作为子程序调用的Object类型成员之一
In addition to its properties, a function contains executable code and state that determine how it behaves when invoked. A function's code may or may not be written in ECMAScript.
+函数除了其属性，还包含可执行代码、状态，用来确定被调用时的行为。函数的代码不限于 ECMAScript。
built-in object that is a function
+作为函数的内置对象
Examples of built-in functions include `parseInt` and `Math.exp`. An implementation may provide implementation-dependent built-in functions that are not described in this specification.
+如 parseInt 和 Math.exp 就是内置函数。一个实现可以提供本规范没有描述的依赖于实现的内置函数。
part of an object that associates a key (either a String value or a Symbol value) and a value
+将一个键（String值或Symbor值）和值相关联的对象的一部分
Depending upon the form of the property the value may be represented either directly as a data value (a primitive value, an object, or a function object) or indirectly by a pair of accessor functions.
+属性可能根据属性值的不同表现为直接的数据值（原始值，对象，或一个函数对象）或间接的一对访问器函数。
function that is the value of a property
+作为属性值的函数
When a function is called as a method of an object, the object is passed to the function as its *this* value.
+当一个函数被作为一个对象的方法调用，此对象将作为`this`值传递给函数。
method that is a built-in function
+作为内置函数的方法
Standard built-in methods are defined in this specification, and an ECMAScript implementation may specify and provide other additional built-in methods.
+标准内置方法由本规范定义，ECMAScript 实现可指定，提供其他额外的内置方法。
internal value that defines some characteristic of a property
+定义一个属性的一些特性的内部值
property that is directly contained by its object
+对象直接拥有的属性
property of an object that is not an own property but is a property (either own or inherited) of the object's prototype
+不是对象的自身属性，但是是对象原型的属性(原型的自身属性或继承属性)
The remainder of this specification is organized as follows:
-Clause 5 defines the notational conventions used throughout the specification.
-Clauses 6-9 define the execution environment within which ECMAScript programs operate.
-Clauses 10-16 define the actual ECMAScript programming language including its syntactic encoding and the execution semantics of all language features.
-Clauses 17-26 define the ECMAScript standard library. They include the definitions of all of the standard objects that are available for use by ECMAScript programs as they execute.
+本规范的剩余部分章节组织如下：
+第5章定义了在本规范中使用的一些符号或者语法的约定。
+第6-9章定义了ECMAScript程序操作包含的执行环境。
+第10-16章定义了实际的ECMAScript语言，包括它的语法编码以及语言特性的执行语义。
+第17-26章定义了ECMAScript标准库。它们包括所有当ECMAScript程序执行时可用的标准对象的定义。