他把石头拿在手上掂了掂重量。

He weighed the stone in his hands.

《新英汉大辞典》

因此科学家设计了一种机型，让牙医拿在手上使用。

So the scientists designed a variation that a dentist could keep on hand.

youdao

但最后他还是只能屈从，整晚都把帽子拿在手上。

He grudgingly obliged and held the hat in his hand all night.

youdao

Everybody sit down again but don't but don't put your--keep your books handy because this is going to be pretty aerobic.

大家都坐下,但不要放下书,拿在手上,因为你们将要做些有氧运动

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