名词
中文翻译：脏线
同义词：
['dirty yarn', 'soiled yarn']
例句：
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1.The old clothes were stained with dirt andthe yarn was soiled.
这些旧衣服被弄脏了，线也脏了。
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2. The dirty yarn was used to makea new sweater.
这条脏线被用来做一件新毛衣。
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3. Thesoiled yarn had tobe washed before it could beused again.
这条脏线在再次使用前必须清洗。