氯氟甲烷主要使用在气溶胶喷雾罐和作为冷冻剂.The chlorofluoromethanes are used principally in aerosol spray cans and as refrigerants.在那里, 较冷的空气使冷冻剂冷凝,并在此过程中变热.There, cooler air condenses the refrigerant and becomes heated during the process.氢是...
Tim hemmed and hawed, but finally told his boss the truth.蒂姆起初支支吾吾，但最终还是把真相告诉了老板。He hemmed and hawed but wouldn't say anything definite.他总是哼儿哈儿的,就是不说句痛快话.He hummed and hawed, giving no definite reply.他闪烁其词, 不做肯定答复....
IT IS normally hard to get excited about encyclopaedias.一般情况下,人们很难对一本百科全书而感到兴奋.He went from door door, selling encyclopaedias.他逐门逐户去推销百科全书.The Chinese encyclopaedia bears a distinctive stylistic feature which is characte...