登山者顺着南坡被冲下山。

The climbers were avalanched down the south face of the mountain.

一失足就可能让他们摔下山。

A single slip could send them plummeting down the mountainside.

下山时可沿上山的路原路折返。

[mass noun]the routes of ascent can be retraced.

他们滑雪下山。

They skied down the mountain.

太阳开始下山。

The sun started to go down.

他奔下山去。

He ran downhill.

沿着这条路下山。

Follow the road downhill.

太阳下山时，你可以在走廊上休憩。

You can relax on the veranda as the sun sinks low.

事故发生在我们下山时。

The accident happened when we were coming down off the mountain.

太阳已下山了。

The sun has set. / The sun has descended behind the mountains.