预约成功
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…
