fix on

They fixed on him to speak on their behalf.

他们已经确定他表发言。

We got a fix on the missile launching site.

我们确定了导弹发射场的位置。

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钉子钉在飞机上的, 不来。