You are probably aware that the earth's orbit around the sun is not shaped like a perfect circle.

你可能知道，地球围绕太阳的轨道形状不像一个完美的圆。

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His iron claw made a circle of dead water round him, from which they fled like affrighted fishes.

它的铁爪在他的周围形成了一圈死水，它们像受惊的鱼一样逃了出来。

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Imagine you want to create a radial list box that arranges its content along a circle, like a carousel.

假设您想要创建一个放射状的列表框，将其内容沿圆周排列，就像一个旋转木马。

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And some of the graves were marked by nothing more than gray, worn down rocks that poked up in a semi-circle like neglected, decaying teeth.

NPR: Excerpt: 'The Garden Angel'

An even bolder option would be to encourage private providers like the Circle health-care group, which took over the failing Hinchingbrooke hospital in Cambridge this year, or try to attract outsiders like Helios, a German company which specialises in improving badly managed health-care facilities, to compete for control of the weaker English hospital trusts.

ECONOMIST: Hospital takeovers

So I started writing more, I built my website inch by inch, row by row, I connected with like-minded people, I expanded my circle of contacts and my mind.

FORBES: When You Hit a Wall, Move Around It