... radiotelexogram 无线电传电报 radius of the earth 地球半径 rags 破布 ...
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effective radius of the earth [地物] 等效地球半径 ; [地物] 有效地球半径
mean radius of the earth [测] 地球的平均半径
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What is the radius of the earth.
地球的半径是多少？
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The radius of the earth, this is the symbol for earth.
地球的符号是⊕
For calculating the force of gravity on a satellite, the radius of the earth is irrelevant.
计算地球作用于卫星的重力时，地球的半径是无关紧要的。
But there is a way to counter the increasing brightness of the Sun, the scientists believe - just increase the radius of the Earth's orbit!
BBC: Blue Marble Nasa
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