Once an asteroid starts approaching Earth, it will do so again and again in an orbital waltz driven by gravity as both bodies travel around the Sun.
一旦某颗小行星开始接近地球，它会在重力作用下，像跳华尔兹一样，一次又一次接近地球，因为它和地球一样也绕太阳运行。
From far off he could hear a childish treble singing: "Waltz me around again, Willie, around, around, around.
他听见一个尖细的重声在歌唱：“带我跳华尔兹吧，威利，一圈一圈又一圈地跳呀。”
We would waltz under the emerald green shade to the rhythm of rustling leaves, and for a rest we would sit on the Banks of a brook and talk about books and music as fish swim around our bare feet.
我们将根据华尔兹翠绿色调的节奏沙沙树叶，和休息，我们将坐在银行的小溪和谈论书籍和音乐鱼游泳围绕我们赤脚。
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