The rainstorm has made the road impassable.

一场暴雨使道路无法通行。

The mud made the roads impassable.

道路因为泥泞而无法通行。

There was an impassable barrier between the white race and the one which they had reduced to slavery.

在白色人种和被他们奴役的种族之间有一道逾越的障碍。