In the cooling case, the system runs by a single circle.

在制冷情况下，系统按单级运行。

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Man is not a circle with a single centre; he is an ellipse with a double focus.

人并不是只有一个圆心的圆圈；他是一个有两个焦点的椭圆。

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Degifting is a mutual agreement to suspend holiday gifts, usually within a single family or circle of friends.

Degifting指在家庭范围或朋友圈内约定过节期间不用互赠礼物，简称过节“免礼”。

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It also has wooden cabinets, each accented with a single silver circle.

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The team found that planets in wide binaries have more eccentric orbits than worlds that circle single stars, suggesting the computer models are on the money.

MSN: Alien planets face danger from double-star systems