fix on

We got a fix on the missile launching site.

我们定了导弹发射场的位置。

They fixed on him to speak on their behalf.

他们定他作为代表发言。

His eyes are fixed on the red embers of the fire.

他的眼睛盯着色的余火。

The tail is fixed on the model plane with nails; it cannot come off.

模型飞机的机尾是用飞机上的, 不会掉下来。