The dots of light you see on the wall are little reflections of sunlight bouncing off the mirror balls I have hanging in the window.

墙上这些小光点是我挂在窗户上的玻璃球反射的阳光。

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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.

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。

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It's true both of bouncing balls and of the semiconductors industry.

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First, the facts: Google surprised the world today with a highly interactive homepage that uses cutting edge web technologies to scatter and gather bouncing balls based on user mouse input.

FORBES: Connecting Google's Doodle Dots: Expect A New, Faster Google

The scene was much like a rock concert, with the foot-stomping, flag-waving crowd dancing and bouncing beach balls as they awaited Obama's arrival.

CNN: Obama: John McCain doesn't get it