It takes the planet only 88 days to whirl around the sun, though, so a Mercurian day lasts about three-quarters of the Mercurian year.
水星绕太阳公转一圈仅需88天，所以火星上一天相当于水星一年的3/4。
Planets are believed to emerge from the accretion of particles in a disk of gas and dust as they whirl around the star.
行星被认为是由围绕恒星旋转的气体和尘埃组成的圆盘中的粒子累积而成。
Tie a stone to a piece of string and whirl it around your head.
将一块石子拴在一根细绳上，然后使它绕着你的头部转动。
We imagine the ball to consist of innumerable minute particles, called atoms or molecules, which vibrate or whirl around one another.
我们想象一个球是由无数的微型粒子组成，称为原子或分子，一个围绕着另一个振动或旋转。
We imagine the ball to consist of innumerable minute particles, called atoms or molecules, which vibrate or whirl around one another.
我们想象一个球是由无数的微型粒子组成，称为原子或分子，一个围绕着另一个振动或旋转。
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