狄氏剂与艾氏剂有关,对蚯蚓的毒性是相似的.Dieldrin is related to aldrin, and its toxicity to earthworms is similar.艾氏剂和氯丹都是重要的杀虫剂.Both Aldrin and Chlordane are valuable insecticides....
He is certainly a good salesclerk.他确实是个能干的店员.What I dislike most is the word'No Problem'replies from salesclerk.但我最讨厌的,是售货员说 ‘ 没问题 ’.I don't know. We can find out by asking a salesclerk.我不知道, 我们可以请店员帮忙找找看....