地球

The globe is rolling round all the time.

地直在转动。

The earth revolves both round the sun and on its own axis.

地既公转又自转。

The earth makes a yearly revolution around the sun.

地每年绕太阳周。

The moon is a satellite of the earth.

是地的颗卫星。

Man is a dweller on the earth.

人类是地的寄居者。

The earth orbits the sun once every 365.25 days.

地每365.25天绕太阳轨。

The lunar stone is different from earth's.

的石头和地的不同。

The earth crosses the tracks of certain comets.

地穿过某些彗星的轨线。

How do you demonstrate that the earth is round?

你怎样证明地是圆的?

The Earth is not a perfect sphere.

地并不是个完全的。

The earth's shadow on the moon was quite distinct.

上的地阴影很清晰。

The rotation of the earth round the sun takes one year.

地绕着太阳旋转要年时间。

Mars takes longer to revolve on its axis than the earth.

火星自转周的时间比地长。

Many types of animal have now vanished from the earth.

许多动物物种现已从地上绝。

Jupiter's gravity slingshots the fragments toward Earth.

木星的重力使碎片加速飞向地。

The earth rotates on its axis once every 24 hours.

地每24小时依其轴心自转次。

The Pacific Ocean is the biggest ocean in the earth.

太平洋是地上最大的海洋。

The shape of the earth is an oval.

地的形状是个椭圆形。

We use a globe in our geography class.

我们在地理课上使用地仪。

There are 37 lectures, major headings are geochronology, radiogenic isotope geochemistry and stable isotope geochemistry.

这里有37讲，主要是地质年代学、放射性同位素地化学和稳定同位素地化学。