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1·Chinese garbage classification policy has come into operation in several cities.

中国垃圾分类政策已经在多个城市生效。

2·The new rules come into operation from next week.

新规定从下周起实施。《牛津词典》

3·When does this new law come into operation?

这项新法律什么时候生效？

4·When does the law come into operation?

新的法律什么时候生效？

5·When does the plan come into operation?

这项计划什么时候实施？

6·The new power station has already come into operation.

这个新的发电站已经开始运转。

7·The new regulations will come into operation next Sunday.

新的规章下星期日起生效。

8·Climate prediction has only come into operation in recent years.

他说：“气候预测只是在近几年才开始实施。”

9·This system has come into operation and produced good effect.

该系统投入使用后，效果良好。

10·The system has already come into operation at present, and made a good result.

该系统目前已经投入使用，并取得了良好的效果。