He raised his hand in greeting.

他举手致意。

《牛津词典》

He raised his hand to wave.

他举起手来挥动。

《柯林斯英汉双解大词典》

He raised his hand to fend off the blow.

他抬起手挡住了那一击。

《柯林斯英汉双解大词典》

So my friend decided he'd give it a try and he raised his hand and he said, "Voltaire," and then paused and hesitated and continued with his lecture as though my friend had never asked his question.

所以我朋友也决定要试试,他就举起手说：“伏尔泰“,然后停顿一下，犹豫会儿，就又接着开始讲了,就好像我朋友没问过问题一样。

耶鲁公开课 - 文学理论导论课程节选

And it's likely they'd have killed him had not Casey raised his hand.

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Recently, Oscar raised his hand in class to respond to some questions.

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Finally, he raised his hand and looked at his watch.

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