gravity wet sink 自重湿陷
I also had to exert a mild mental push against gravity if I wanted to keep an object moving in a straight horizontal line; otherwise it would sink vertically.
同时如果我想让一个物体平移，我还要克服重力的作用，否则它就会垂直下沉。
Then, whenever you open a hot water valve in your house, such as a sink or shower, then it will gravity feed.
这样，只要我们在任何时候打开房间内浴缸或的淋浴喷头的热水出水阀，热水器的水箱就能在地球引力的作用下自动添水。
When they are too high they sag under the stars' gravity and sink back into the ground.
当它们太高的时候，就会在中子星的引力作用下下坠，重新陷入地面。
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