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一团土
1、conservation of mass───[物]质量守恒;质量守恒定律;n.质量守恒定律
2、earth───vt.把(电线)[电]接地;盖(土);追赶入洞穴;n.地球;地表,陆地;土地,土壤;尘事,俗事;兽穴;vi.躲进地洞
3、age of earth───地球时代
4、climates of earth───地球气候
5、a mass of───adj.大量的
6、murmurs of earth───大地的低语
7、diameter of earth───地球直径
8、spheres of earth───地球的球体
9、center of mass───[力]质心;质量中心;n.质心
1、The largest terrestrial planet, Earth has a diameter only one quarter as great as the diameter of the smallest Jovian planet, Neptune, and its mass is only one seventeenth as great.───最大的类地行星地球的直径仅仅是最小的类木行星海王星的四分之一,而且地球的质量仅仅是其质量的十七分之一。
2、The first is a pair of planets, each about the mass of Jupiter, that whirl around their home star 15 light years from Earth in perfect lockstep.───第一个是一对质量与木星差不多的行星,它们以完美的步调围绕距离地球15光年的母恒星旋转。
3、The exoplanet is a few times the mass of Earth, but it should still be small enough to be rocky rather than a gas giant like Jupiter.───这个系外行星的质量是地球的几倍,但是它足够小,能够由岩石构成,而不是像木星是一团巨大的气体。