It's pretty impossible to travel over these mountains in winter.

冬天越过这些大山旅行，相当不可能。

youdao

It's pretty well impossible to travel over these mountains in winter.

冬天越过这些大山旅行，几乎是不可能的。

youdao

It's pretty well impossible to travel over these mountains in winter.

在冬季要跨越这些高山，几乎是不可能的。

youdao

It was not possible to travel straight through because of the Rocky Mountains and the deep snow that fell in winter.

VOA: special.2010.04.26

And something did. The following winter, the winter of eighteen fifty-one, is still remembered for the heavy snows in the mountains.

VOA: special.2009.06.06

However,the heaviest snowfalls have been reported in the mountains of other areas during winter.

VOA: special.2010.01.05

In winter these are amongst the snowiest mountains in Alaska, with upwards of 80 feet of snow falling on the peaks.

BBC: Journey into the Alaskan wild

Now they face their third exhausting winter in the mountains.

ECONOMIST: A gleam of hope for peace in miserable, war-weary Chechnya

The sky was gray near the tops of the mountains, as gray as a dark day in winter.

NEWYORKER: Beginners