不久它被氯仿所代替.It was soon replaced by chloroform.用氯仿将有机质提取出来并称重.The organics are extracted with chloroform and weighed.毫无疑问,氯仿是含碳?卤键的最重要的化合物之一.Without doubt chloroform is one of the most important compounds containing a carb...
Her drawing is competent, but her composition is poor.她的画有功力, 但布局欠佳.Competent geologic advice is mandatory for any engineering decision.适宜的有关地质方面的建议,对于任何工程方面的决定都是必需的.They are intelligent, competent and strong - minded, w...