sometimes they become one word
Sometimes they become one word （有时它们可组成一个词）: Sometimes they become two words （有时它们可组成两个词）: Sometimes they become hyphenated （有时它们可以由连字号，即“...
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sometimes they become one word
有时它们会变成一个词
以上为机器翻译结果，长、整句建议使用 人工翻译 。