He had been totally inactive for two weeks.
经闲了两个星期了。
词词
过的;He had been totally inactive for two weeks.
经闲了两个星期了。
35. Ethylene and trans-dichloroethylene are both inactive in the infra-red in this region .
乙烯和反式二氯乙烯在红外光谱的这个区域都无活性。
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