secede.
secede vi. Withdraw formally from membership in a group, association, organization, etc.; to break off one's connection with others, as in a political or religious group (从宗教、政党、联盟等组织中退出,脱离)
1) Nine States seceded from the Union government and established their own confederate government.
(
九个州脱离联邦政府,成立了自己的邦联政府。)
2) They seceded from the EEC. (他们从欧洲经济共同体中退出。)
15. pharmaceutical adj. 药物的,药学的 n. 药品
请看下面几个单词,对记忆和理解pharmaceutical会有帮助。
pharmacy 药学 pharmaceutics 制药学
pharmacology 药理学 pharmaceutist 药剂师
16. derive v. 由…得到;起源,由…派生
1)They derive enormous pleasure from reading. (他们从阅读中得到了极大的乐趣。)
2)He said he derived no real satisfaction from his work. (他说他从工作中得不到真正的满足。)
3)This word is derived from Latin. (这个单词从拉丁语派生而来。)
4)Electric power can be derived from the sun-warmed surface waters of the ocean.(电力可以从晒热的海洋水面获得。)