通常，我们在冬天是白色的，而在夏天是棕色的。

Usually, we are white in winter and brown in summer.

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研究人员发现，在冬天，一半参与者都会打哈欠，而在夏天打哈欠的受试者只有25%。

The researchers found that half of the participants yawned in winter while only a quarter yawned in summer.

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为什么流感在冬天爆发，而在夏天却几乎消失不见？这个问题几十年来一直困扰着流行病学家。

Why the flu strikes hard during the winter but nearly vanishes in the summer has baffled epidemiologists for decades.

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And now, it's like everyone just wants to be in Central Park, picnics all the time in the summer.

而现在，好像人人都想去中央公园，在夏天，他们随时都想在这里野餐。

最美丽的公园 - SpeakingMax英语口语达人