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+# 逗号
+
+**Since we are already late,** we don't have time to stop.
+**If you have found the page,** please begin reading.
+
+非独立的副词从句放在前后面加逗号。
+
+**We don't have time to stop** since we are already late.
+**Please begin reading** if you have found the page.
+
+反过来则不用逗号。
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