Thin river ice is a significant issue because winter travel is mainly achieved by using the frozen rivers as a transportation route via snow machines or sled dogs.

河面上的冰层十分重要，当地人冬季出行主要就是通过雪车或狗拉雪橇走冰面上的交通路线。

youdao

Before silos were invented, cows gave less milk during winter because they had no green grass to eat.

筒仓发明之前，因为没有青草可以吃，奶牛在冬天产奶量减少。

《柯林斯英汉双解大词典》

Because of Canada's cold winter, Canada geese have to fly to the warm south in autumn.

因为加拿大的冬天很冷，加拿大鹅不得不在秋天飞到温暖的南方去。

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 you'll find too because of J term this year or winter break where you guys can finally come back onto campus a bit early for various opportunities.

你还会发现由于今年的J学期或寒假,大家可以早点返回校园,这会带来各种机会。

哈佛公开课 - 计算机科学课程节选

A lot of people move there during the winter because it gets really, really nice,

很多人冬天到那里去，因为冬天真的很好很好。

沙漠之城-菲尼克斯 - SpeakingMax英语口语达人

It was a tease because winter has been here for the last six weeks.

WSJ: In snow-socked Northeast, spring seems far away

"They were believed to be spreading because the winter was not cold enough to kill them, and that's destroying forests, " he said.

CNN: Ice melting across globe at accelerating rate, NASA says

But it's likely that if "Revolution" doesn't succeed during the second half of its first season, it won't be because of winter break.

CNN: STORY HIGHLIGHTS