The terrorists fired into the crowd at random.

恐怖分子胡乱地向人群开枪。

It is better to read a few books carefully than to read many at random.

随便读许多书不如细细地读几本书。

A small boy appears utterly confused as the ears twirl apparently at random above him.

一个小男孩看起来非常困惑，而他的耳朵在他上方随意地转动着。

The experimenter is back there with the speed knob and at random intervals, he just speeds up the tape of their heart and then slows it down.

实验者带着速度旋钮回到那里，在随机的时间间隔里，他只是给他们的心跳录音带加速，然后再减速。

Names were chosen at random from a list.

名字是从名单中随便点的。