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1·The Earth orbits in an ellipse.

地球沿椭圆形轨道运动。《柯林斯英汉双解大词典》

2·The earth revolves on its axis.

地球环绕自身的轴心转动。《牛津词典》

3·The earth moves round the sun.

地球围绕太阳旋转。《牛津词典》

4·The earth rotates around the sun.

地球围绕太阳旋转。《柯林斯英汉双解大词典》

5·The earth revolves around the sun.

地球绕着太阳转。《牛津词典》

6·The earth is illuminated by the sun.

太阳照亮地球。《牛津词典》

7·When did mammals appear on the earth?

地球上的哺乳动物起源于何时？《牛津词典》

8·The moon exerts a force on the earth.

月球对地球有引力。《牛津词典》

9·People used to think the earth was flat.

人们曾经认为地球是平的。《牛津词典》

10·The earth takes a year to orbit the sun.

地球绕太阳一周要一年的时间。《牛津词典》