According to characteristic of regional exploring satellite system, an intermittent regional covering orbit design scheme is proposed using circular sun synchronization orbit.

根据区域性探测卫星系统的特点，提出了利用太阳同步轨道间歇性区域性覆盖特定区域的轨道设计方案。

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A lot of people think of earth's orbit around the sun as being perfectly circular, as smooth and as regular as, say, the way that hands move on a well-made watch, but it just doesn't work that way.

很多人认为地球绕太阳的轨道是完美的圆形，就像手在一块制作精良的手表上移动那样平滑、有规则，但事实并非如此。

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During summer on the top half of Earth, our planet is actually farther from the sun than during winter, a fact owing to our non-circular orbit around the sun.

在地球的上半部分为夏季的时候，实际上这时的地球离开太阳的距离比在冬季还要远。所以会这样，是由于我们围绕太阳运行的轨道，并不是圆的。

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Although there was no river view from our bedroom, a private sun terrace (accessed by a small circular staircase) allowed us to watch the rice barges drift down the Chao Phraya.

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The buildings, with a circular shape and a flat roof, were made of mud, sun-dried mudbricks and stone.

UNESCO: Choirokoitia