radius of the earth

基本解釋

The radius of the Earth's orbit is about 400 times the radius of the Moon's orbit.
地球的軌道半徑大約是月球軌道半徑的400倍。
At just 1.5 times the radius of the Earth, this planet (if it’s confirmed) would be the smallest yet discovered.
這顆行星（如果被證實(shí)的話）大約是地球半徑的1.5倍大，將是目前為止發(fā)現(xiàn)的最小行星。
If you substitute in here the mass of the Earth and the radius of the Earth, then you will find that this is about 11.2 kilometers per second.
如果你在這兒代替,地球質(zhì)量和地球半徑，然后你會(huì)發(fā)現(xiàn)這是,大約11。2千米每秒。