天王星上的季节（英文）

摘要

＜正＞你知道天王星上一个季节相当于地球上多长时间吗?答案一定会令你大吃一惊。Suppose you are standing at the North Pole of Uranus.You can’t.You’d sink right in.But if you could,you would see the sun appear on the horizon,circle higher and higher for 21 years,and then circle back down to the horizon over the course of another 21 years.Once the sun went below the horizon,you would experience another 42 years of darkness before the sun appeared again.