gravity
/ˈgrævɪti/
(physics) the force of attraction between all masses in the universe; especially the attraction of the earth's mass for bodies near its surface; ; ; --Albert Einstein
中文释义：重力；引力
Newton's law of gravity explains why objects fall to the ground.
牛顿的万有引力定律解释了物体为何落地。
The gravity of the situation became clear when the storm hit.
风暴来袭时，情况的严重性变得清晰。