I had undergone an operation in which part of a bone in one leg was used to replace the shattered bone in the other.

我经历过一场手术，用一条腿部分的骨头代替另一条腿粉碎的骨头。

youdao

The officer refused to let his men take part in the operation.

这军官拒绝让他的士兵参加这项军事行动。

《牛津词典》

The climax to the operation came when, on 5 May 1971, part of the ship's frame was uncovered.

在1971年5月5日，当部分船体框架被发现时，这一行动达到了高潮。

youdao

Then the little ones go under the blow dryer. "They are so happy once they're de-oiled and it actually makes you feel pretty good that this part of the operation is being done to save these animals."

VOA: standard.2010.06.08

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