When driving in a car on a hot summer day, you may see what looks like shimmering water on the road, which, as science tells us, is really just a mirage, an illusion caused by the heating of the air.

在炎热的夏天开车时，你可能会在路上看到闪闪发光的水，但科学告诉我们，这其实只是海市蜃楼，是空气加热造成的幻觉。

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Present-day concern with music is shown by the existence of something like a hundred summer schools in music, which cater for all grades of musicians, from the mere beginner to the skilled performer.

目前对音乐的关注表现在一百所夏季音乐学校的存在，这些学校满足各个级别的音乐者，从初学者到熟练的表演家。

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My mind is calm, like a lake on a quiet summer day.

我内心平静，就像夏日里平静的湖面。

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That would be like a hot summer day for Hampton Beach for us.

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The base will actually be built inside a real crater and the daytime temperature of -23 degrees Celsius is like a nice summer's day on Mars.

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"I feel like a third-grader on the first day of summer, " she says.

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