单词：ultracentrifuges
a. 用超高速离心器( ultracentrifuge的比较级 )
v subject to the action of an ultracentrifuge
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1. The shortest complete sentence in the English language consists of only one word and that is Go. 英语里由一个单词组成的最短的完整的句子就是GO. 2. The oldest word in the English language is town. 英语里最有年头的一个词
英文语法词汇