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Methods Etiracetam was synthesized from 2 - pyrrolidone by N - alkylation and aminolysis.方法 2- 吡咯烷酮经N - 烷基化、氨解反应合成乙拉西坦....
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coloptosis的音标：coloptosis的英式发音音标为：[kɒlɒp'təʊsɪs]coloptosis的美式发音音标为：[kɒlɒp'toʊsɪs]...
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Shares ended 1.7 per cent firmer on the Frankfurt exchange.法兰克福交易所收盘时股票上涨了1.7%。The pound is firmer on the foreign exchange market.英镑在外汇市场上较前坚挺.The areas of consolidation are firmer than the surrounding lung.实变区域比周围的肺组织坚韧...
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Check out Buck's selection of tapered and pocket sharpeners.购买巴克精选的锥形磨刀器和口袋磨刀器.Yes , I want two sharpeners , please.我想买两个卷笔刀....
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gasohol的音标：gasohol的英式发音音标为：['gæsəhɒl]gasohol的美式发音音标为：['gæsəhɔl]...
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Complement enzymes attack antigens by puncturing the cell membrane.补体酶通过刺穿细胞膜来攻击抗原.Some antigens, or combinations of antigens, are much more potent than others.某些抗原或者联合抗原可比其它抗原作用强得多.There are numerous inherited antigens ...
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不可滥服古柯碱.Don't have cocaine abusively.古柯叶也应用于仪式 、 医药与其他产品.It is also used in rituals, medicine and other products.古柯叶也可拿来泡茶治疗惧高症.The leaf is also used as a tea for altitude sickness....
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impropriate的音标：impropriate的英式发音音标为：[ɪm'prəʊprɪeɪt]impropriate的美式发音音标为：[ɪm'proʊprɪˌeɪt]...
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电梯开动了，接着剧烈震颤起来，然后就毫无反应了。The lift started off, juddered, and went out of action.电梯嘎吱一声停在了一层。The elevator creaked to a halt at the ground floor.电梯修理工可以转动这根杠杆直接操作机器。An elevator mechanic can work the machinery directly by tu...
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“苍白”的反义词：红润。...
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“重罪”的拼音为：zhòng zuì...
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Loxosceles的音标：...
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n.小船运输，小船运费...