伽利略从比萨斜塔上扔下不同重量的物体，并计算它们的下落时间。他要实现的不仅是他的勃勃雄心。

Galileo was not merely ambitious when he dropped objects of varying weights from the Leaning Tower at Pisa and timed their fall to the ground.

youdao

随着晶体体积的增大，它的重量也相应增加，于是它将透过云层开始下落。

As it grows, it gets heavier. It starts falling through the cloud.

youdao

我给各位演示，下落途中，的确是没有重量的，这有个壶。

And I'm going to tell you how I can convince you that as I jump, that I will, indeed, be weightless Here is the bottle.

youdao