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。
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。
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。
In Boston in the winter, this experiment worked very well because we were always in an environment full of static electricity.
在冬天的波士顿，这个实验进行的非常好，因为我们一直处于充满静电的环境中。
The New Yorkers who spent a bundle on an outdoor hot tub now admit they rarely use it, "because we can't afford to heat it in winter".
那些花一大笔钱买了一个户外加热浴缸的纽约人现在承认，他们很少使用它，“因为我们在冬天负担不起加热它的费用。”
Because of the cold temperatures, the tundra has two layers: top layer, which is called the active layer, is frozen in the winter and spring, but thaws in the summer.
由于寒冷的气温，冻土带有两层：最上面的一层被称为活动层，在冬季和春季被冻结，但在夏季解冻。
In the winter, I want to eat hot pot with my parents because it's very delicious.
冬天，我想和我的父母一起吃火锅，因为它很好吃。
Winter and summer happen because the earth is tilted as it revolves around the sun.
冬天和夏天的出现是因为地球绕太阳公转时是倾斜的。
Because of this loop, which is promoted by warmer temperatures in winter and spring, well, it looks like the tundra may be turning into shrub land.
由于冬春两季气温的上升加剧了这样的循环，因此，苔原可能正在向灌木林地转变。
Some of us can't enjoy autumn because we know that the cold days of winter follow it.
我们中的一些人不喜欢享受秋天，因为他们认为秋天之后就是寒冷的冬季了。
Because in the north the sum is low during winter, the sunlight appears quite blue. Because the sun is higher during summer, the hot summer sunlight appears yellow.
因为在北方冬季太阳低，使人觉得似乎阳光有点发蓝，而在炎热的夏季令人觉得阳光似乎是黄色的。
If he's right, it is possible the second, winter wave of 1918 flu was more deadly not because of viral evolution but because bacterial infections are more common in winter.
如果他的假设正确，则在1918年冬天爆发的第二波流感变得更加致命的原因很可能不是因为病毒的演变而是因为细菌感染在冬季更加常见。
In a cold winter, a couple had to move out from the luxury villa because of bankruptcy.
一个寒冷的冬天，一对夫妇因为破产，不得不从豪宅里搬出。
Moreover, among energy partner countries, Iran seems to be the least reliable partner because of problems of stability in the colder winter periods.
此外，在能源合作伙伴国中，伊朗似乎是土耳其最难以信赖的国家，因为这个更寒冷的冬天里，土耳其更需要稳定。
Scientists say they expect stronger storms, in winter and summer, largely because of the physical principle that warmer air can hold more water vapor.
科学家说他们预计在冬季和夏季会有更强的风暴，很大一部分原因是因为物理学原理：暖空气能够容纳更多的水蒸气。
It's impossible to get to Mirny in any other season except winter because there is no bridge across the river between the two cities.
只有在冬天才有可能到达到米尔内，原因是河流阻隔这两个城市，而河流之上却没有桥梁。
And when the days grow shorter in the winter, the lights are left on longer, because light stimulates egg laying.
此外，当冬季白天变短的时候，养鸡棚里的照明时间就要加长，因为光线会刺激母鸡产蛋。
The election was closely watched because the Kremlin promised it would be fair, and because Sochi is holding the 2014 winter Olympics.
此次选举被密切关注，因为克里姆林宫保证过它将是公平的，同时也是因为索契将举办2014年冬季奥运会。
Winter is known as cold season - and it's not just because the temperatures are dropping.
冬天是一个寒冷的季节，不仅仅是因为它的温度在降低。 你感冒的几率在这个季节里在增大。
Colds are more common in the fall and winter because the cooler, wetter weather drives people inside, and viruses can more easily jump from one person to the next.
在较冷的秋季和冬季，寒冷更为常见，更为阴冷多雨的天气让人们呆在室内，病毒可以轻易的从一个人传给另一个。
It might be a good thing to be playing in winter, because it won't be very hot.
在冬天打比赛也许对球员也是好事，因为这不会太热。
Higher temperatures may also increase the risk of pests and parasites, because fewer will die off during the winter.
较高的气温也会增加生害虫和寄生虫的危险，因为冬季虫子死的更少。
"We travelled a long time because we left the village in winter and we came here in April," she said.
她说：“我们走了很久，因为离开村子的时候是冬天，而来到这里时是四月。”
Some of us can't enjoy autumn because we know that thecold days of winter followit.
我们中的一些人不喜欢享受秋天，因为他们认为秋天之后就是寒冷的冬季了。
Some of us can't enjoy autumn because we know that thecold days of winter followit.
我们中的一些人不喜欢享受秋天，因为他们认为秋天之后就是寒冷的冬季了。
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