I gauged the distance to the seat and prepared to jump for it.

我估量着自己跟座位的距离，准备跳上去。

The instrument can gauge a distance with the push of a button.

【button】这台仪器只要一按按钮就能测出距离。

He followed it with every sense alert; it was not only difficult to gauge his exact distance from it, but almost impossible to tell if it stopped for a moment.

他全神贯注地跟着它。 不仅很难判断他与它的确切距离， 而且几乎无法判断它是否停了一会儿。