The sea and air grow warmer; the polar air of winter begins its gradual retreat.

海洋和天空变得温暖，冬天的极地气团开始逐渐减弱。

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By the time winter begins, coastal waters are thoroughly mixed, with virtually no temperature or salinity differences between surface and bottom waters.

到冬季快要开始的时候，沿岸的海水已经彻底混合，表层和底层的水几乎没有什么温度差和盐度差了。

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If your current plan to stay healthy this winter begins and ends at drinking extra orange juice, you might want to rethink that strategy.

今年冬天，如果你目前的保持健康计划从头到尾都是多喝果汁的话，那你可能就要重新考虑一下你的策略了。

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It is always a good idea to keep a lot of necessary supplies in the home even before winter begins.

VOA: special.2010.01.05

"Our greatest fear right now is that if we don't raise the same level of money that we did a year ago, knowing that we have to help more people in January and February when the brunt of the winter begins to take hold and hits, we're going to be really pressed to keep the utilities bills paid and the heat on in many,many homes,"

VOA: standard.2009.12.16

It begins slowly, during the dark months of winter.

VOA: special.2009.08.12

Officials from WHO and the CDC plan to monitor developments in the Southern Hemisphere, where flu season arrives over the next few months as winter begins there.

CNN: Second U.S. death linked to swine flu, officials say

Winter semester begins in September, and the summer semester starts in February.

UNESCO: MEDIA SERVICES

It follows the calendar year, and it begins - because it's the winter, it begins in the West.

NPR: Six Days to the Super Bowl. Start Warming the TV