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A novel dust proofing agent for dyestuff was prepared by the addition of industrial fatty acid and glycol epoxide, which could produce a kind of emulsor.

采用工业和环氧乙烷加成法研成乳化剂,进而获得一染料防尘剂。

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on the strength of, on the table, on the urban scene, on the way, on the whole, on the wing, on their way, on this ground, on time, on top of,

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3G, 401(K), a,

声明：以上例句、词性分类均由互联网资源自动生成，部分未经过人工审核，其表达内容亦不代表本软件的观点；若发现问题，欢迎向我们指正。

原声例句
VOA Standard 2015年11月合集

It is water and dust proof, and cannot be removed from the bike without a special key.

仪器，有殊钥匙无法拆除。

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oncarrier, once, once a week, once again, once and for all, once for all, once in a while, once more, once upon a time, once-over,

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3G, 401(K), a,
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