地球引力

So the moon's gravity pulls the sea toward it on one side of the earth, creating one high tide.

所以月球的引力把地球一侧的海水拉向它，造成一次涨潮。

The Master asked M. to explain the cause of the tide. M. drew on the ground the figures of the sun, moon, and earth and tried to explain gravitation, ebb-tide, flood-tide, new moon, full moon, eclipse, and so forth.

师父叫M去解释涨潮的原因。M在地上画了太阳、月亮与地球的轮廓，设法解释引力作用、退潮、涨潮、新月、满月、月蚀等诸如此类的关系。

All objects are pulled towards the centre of the Earth by the force of gravity.

所有的物体都由于引力而拉向地球中心。

The force of gravity makes things fall.

地球的引力使物体下落。

That theory must go hand in hand with practice is a principle we should always keep in mind.

重量是地球作用在物体上的引力，这是大家都知道的。

Satellites, however must be closely watched, for they are constantly being tugged at by the gravitational attraction of the sun, moon and earth.

我们必须密切关注卫星，因为他们正不断被太阳，月球和地球的引力牵动着。

When people go out into space, they are away from the earth's gravitational field.

当人们进入太空，他们就离开了地球的引力场，那就没有引力了，他们就处于失重状态。

And the gravitational pull of the moon and the sun.

风、地球的运动或震颤和月亮、太阳的引力。

They occur when the gravitational forces of the Moon and the Sun are perpendicular to one another.

当他们出现在月球的引力和太阳是地球上互相垂直。

Because the planet is so close to the star, it is gravitationally locked to it in the same way the Moon is locked to Earth.

由于这颗行星距其恒星太近，引力把它束缚在恒星周围，就如同月球被束缚在地球周围一样。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。