他不得不停下
He had to stop.
以上为机器翻译结果，长、整句建议使用 人工翻译 。
他不得不停下来把它们捡起。
He had to stop to pick them up.
youdao
他不得不停下来，因为他口袋里的最后一颗钉子已经用完了。
He had to stop, for the last nail was gone from his pocket.
他不得不停下工作，而且没办法集中精力。
He had to stop working and he couldn't focus.
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