This is important because it helps us to distinguishing forms that are used as a pre-modifier of a noun and those that are used as the first part of a compound word.
这一点非常重要，因为它可以帮助我们把用作名词前置修饰词的- ing形式和用作复合词第一个构词成分的- ing形式区别开来。
This is important because it helps us to distinguishing forms that are used as a pre-modifier of a noun and those that are used as the first part of a compound word.
这一点非常重要，因为它可以帮助我们把用作名词前置修饰词的- ing形式和用作复合词第一个构词成分的- ing形式区别开来。
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