keep warm

基本解释

Our frozen ancestors of the Ice Age needed plenty of fat in their diets to keep warm – and it seems we might still be carrying their genetic torch.
在遥远而又寒冷的冰河时期，我们的祖先需要从食物中获取大量的脂肪，以用来保持温暖，不过生活在现代社会的人们似乎依旧继承者祖先们的这一遗传基因。
Frankfurt is the most expensive place to buy clothes, but residents won't be penalised heavily if they keep warm instead by leaving the heating on, which is half the New York cost.
服装最昂贵的地方是法朗克福，不过如果当地居民只是保暖的话，消费并不会太离谱，只需要纽约的一半。
One reason for this is that insects are cold-blooded, so they don't need to eat food to keep warm.
原因之一是因为昆虫是冷血的，所以它们并不需要靠吃食物来保暖。

The weather is warm. They do not have to wear heavy clothes to keep warm.
You try hard to keep warm. The days are shorter and darker.
They will place extra covering around the chest, head and neck of hypothermia victims to keep them warm.

The warmly dressed children walk but the others have to run to keep warm.
UNESCO: MEDIA SERVICES