| 释义 |
DEFINITIVE EXAMPLES 权威例句〔Norplant〕A trademark used for the drug levonorgestrel.诺普朗特：左旋去黄体酮乙基、乙基炔诺酮药剂的商标美国传统〔antiknock〕A substance, such as tetraethyl lead, added to gasoline to reduce engine knock.抗震剂：一种加在汽油中可以减轻发动机震动的物质，如甲乙基铅美国传统〔ethylate〕To introduce the ethyl group into (a compound).使乙基化：把乙基引入（一化合物）美国传统〔urethane〕Any of several esters, other than the ethyl ester, of carbamic acid.聚氨酯：一种氨基甲酸中除乙基酯以外的酯美国传统〔white gasoline〕Gasoline containing no tetraethyl lead.无铅汽油：不含四乙基铅的汽油美国传统 |