英语：固定搭配精讲：economize on

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

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

　　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