... The population on Earth 地球上的人口 A circle around the sun 绕太阳一周 A guide to living on Mars 在火星的生活指南 ...
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Since we complete a circle around the sun every year, the stars of summer, such as those in the Big Dipper, are always the stars of summer.
由于每年绕着太阳完成一个循环,夏日里我们所看到的星星,比如北斗七星,它们始终在其他年份的夏天里也都能看得到。
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。
For a cheaper, although not quite as direct, method, journey north of the Arctic circle around the summer solstice and spend a night (ideally in a hot tub) watching the sun circle above the horizon.
当然一个低成本但不是相当直接的方法是,夏至时去北极圈旅行,花一晚上的时间(能在热水缸里最好)看地平线以上的太阳圈。
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