Left to itself in the room, the baby began to cry.
当被孤独地留在房间里时,婴儿哭了起来。
If left to itself, the earth would grow grass and many other good things.
如果留给自己,地球将种草和其他许多美好的事物。
We know the water moves downwards when its left to itself as in rain, but you see if it moves downward on the right that would leave a gap, vacuum a hole in the pipe.
我们知道水都是往下运动的,就好比如同下雨一样,但是你会发现如果在右边的水也向下运动,就会产生一个空隙,在吸管里会有一段真空部分。
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