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He had a sudden impulse to stand up and sing.
他突然心血来潮，想站起来歌唱。
《牛津词典》
She stood up in a sudden impulse of terror.
在突然的恐怖感引起的冲动下，她站了起来。
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We were seized by a sudden impulse to run.
我们身不由己突然想跑。
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