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1·This law becomes operative immediately.

本法规即时生效。《牛津词典》

2·The station will be fully operative again in January.

该站将于一月份全部恢复运营。《牛津词典》

3·I was in love with her—'was' being the operative word.

在I was in love with her这句话中，was是关键词。《牛津词典》

4·The commercial telephone service was no longer operative.

商业电话服务不起作用了。《柯林斯英汉双解大词典》

5·In an automated car plant there is not a human operative to be seen.

在全自动汽车制造厂，一个工人也看不到。《柯林斯英汉双解大词典》

6·As long as the operative word is greed, you can't count on people keeping the costs down.

只要关键词是“贪婪”，你就不能指望人们降低开销。《柯林斯英汉双解大词典》

7·In the wild, they are a co-operative, group-living species.

在野外，它们是合作的群居物种。

8·They are good-natured, co-operative creatures, and they share their food readily.

它们性情温和，乐意合作，也乐于分享食物。

9·Donkey carts battle for space with pedestrians and the only operative road rule is might is right.

驴车与行人争抢空间，唯一可行的道路规则是“强权即公理”。

10·Swipe is the operative word: cards are increasingly vulnerable to attacks when you make purchases in a store.

“刷卡”是最关键的一个词：当你在商店购物时，信用卡越来越容易受到攻击。

(1)operative treatment手术治疗