If I jump from a tower which is 100 meters high I will be weightless for 4.5 seconds ignoring air drag.

如果我从100米的楼上跳下去，无重量时间大概是4。5秒，忽略空气阻力不计。

youdao

I can jump higher than the Eiffel Tower!

我能比艾菲尔铁塔跳得还高！

youdao

Can I explain why I wanted to jump off the top of a tower block?

我能解释一下为何我想从塔楼顶端往下跳吗？

youdao

Bill DeMong says that growing up in Lake Placid, New York,with the 26-story tall large hill jump tower on the horizon, he was always exposed to the sport.

VOA: standard.2010.01.31

You could even pledge enough money to base jump from the top of the tethered research tower, which will be held aloft by helium balloons.

ENGADGET: Liftport turns to Kickstarter for space elevator experiment (video)

The way the Dogpile worked was whomever was not the poor sap whose named was shouted out, would proceed to jump on top of him and work to create a tower of humanity with the unfortunate Dopile-ee at the bottom of the heap.

FORBES: Dogpile On Social Media