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

　　222. have an effect on 对…有影响

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

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

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

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

　　227. to no effect 不起作用,没有取得任何效果

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

　　229. to the effect that 大意是…,主要内容是…

　　230. to that effect 是那个意思的…