对于火车上的观察员来说，光圈是匀速向各方面扩展的。
To the moving observer on the train, the circle of light expanded equally on all sides.
于是他像一只小猫地叫着，使得托托竖起了它的耳朵，向各方面搜索，找寻。
Here he mewed so like a kitten that Toto pricked up his ears and looked everywhere to see where she was.
构成气体的数量极大的粒子是向各方面运动的，它们撞击容器的壁与活塞，撞了又跳回来，正如掷到墙上的球一样。
A tremendous number of particles constituting the gas are moving in all directions. They bombard the walls and the piston, bouncing back like balls thrown against a wall.
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