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。
They got up early to watch the sun come up.
他们早起,为的是看日出。
For example, have you ever awakened early to watch the sun rise?
比如,你曾清早起床到外面观看过日出吗?
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