228. (be) of no effect (=useless) 无效　­

227. to no effect 不起作用,没有取得任何效果　­

226. give effect to (=carry out) 实行,使…生效　­

225. in effect (=in fact, really) 实际上　­

224. go into effect 生效. ( 近 come into effect; take effect; be brought into effect)　­

223. be in effect (=be in operation) 有效　­

222. have an effect on 对…有影响　­

221. economize on (=save sth. instead of being wasteful) 节省　­

220. put sb. at his　her ease (=free sb. from worry or nervousness)使某人感到无拘束　­

219. at (one’s) ease ( = without worry or nervousness) 自在,不拘束　­