Your child should not take matters into his own hands; he should let the teacher deal with the bully.

孩子不应该自己承担，如果有任何类似的事件发生，应该让老师来处理。

youdao

A moment of panic followed, before the teenager decided to take matters into his own hands and find a way out.

惊慌随之而来，然而这个少年很快镇定下来，他决定把控局面，寻找逃生出路。 。

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If a worker got fed up with working and wanted to make the machine stop going, he could decide to take matters into his own hands.

如果工人对工作感到厌烦，想让机器停下来，他可能会决定亲自动手。

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Instead he apparently decided to take matters into his own hands and, at best, made a serious error.

CNN: STORY HIGHLIGHTS

They are threatening, yes, and Kelly will tell you, as he told CNN, that he feels he might soon have to take matters into his own hands.

CNN: Angry young men

Rather than take matters into his own hands, the Justice Department argued to the 2nd U.S. Circuit Court of Appeals that Korman should have ordered the FDA to reconsider its options for regulating emergency contraception.

NPR: Justice Department Appeals Morning-After Case