docs issue at: Using Animation Curves

[JumpIntoCoding]

filePath: en/animation/use-animation-curve.md
content:

1. Chinese Version is more detailed but difficult to understand (e.g. Chinese version didn't state and explain the relationship between "Animation Curve", "curve value" and keyframe like english version.)
2. English version is easier to understand but probably incomplete (e.g. Chinese version explained "position" has three curver, but not in english version)
3. CN version and EN version have different coding example!!!