In addition, yawning when it is extremely cold may be maladaptive, as this may send unusually cold air to the brain, which may produce a thermal shock.
另外，在极度寒冷的时候打呵欠也许不大合适，因为这时通常会将冷空气送到大脑，从而使大脑发生热冲击。
I've notice a few of these wonderful trees on my travels over the past few weeks they all seem unusually heavy in blossom... could it be the cold?
我在过去的几个星期旅行途中曾注意到几棵这样的奇妙的树，它们的花开得不同寻常的密，这会是因为天气冷的缘故吗？
The old peasant conjectured that it would be an unusually cold winter.
那老农推测冬天将会异常地寒冷。
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