1. Because the gravity on the Moon´s surface is only a sixth of Earth´s (remember how easily the Apollo astronauts bounded along),
    由于月球表面的重力仅是地球表面的1/6 -- 还记得阿波罗飞船中的宇航员累松地跳跃 --

2. The reason lies in its gravity.
    其原因在于月球的重力。

3. Apparently, wearing high heels pushes your breasts (胸脯) out by changing your center of gravity (重心).
    虽然，穿高跟鞋可以通过改变人的重心而使乳房突出来。

4. "When you start pulling G's," he reminded me, referring to gravity forces, "your G-suit will fill with air automatically."
    "当你拉动G服时，"他提醒我道（G指的是重力），"你的重力服就会自动充气。

5. Gravity is a form of magnetism.
    重力是磁力的一种表现形式。

6. He identifies himself with its centre of gravity, its mass, its weight;
    他把自身和物体重心、质量、重量融为一体。

7. Once waves have been generated, gravity is the force that drives them in a continual attempt to restore the ocean surface to a flat plain.
    一旦波浪形成，地球引力是持续不断企图使海面复原为平面的力量。

8. I don´t think you realize the gravity of the situation.
    我认为你没有意识到局势的严重.

9. In tight turns and recovering from dives, it can pull nine G's, or nine times the force of gravity, causing a 200-pound man to weigh nearly a ton.
    在急转弯和俯冲后拉升时，它能达到超重9倍，也就是重力的9倍，让一个体重200磅的男子重达近1吨。