Another thing that makes it unique is the glass bottom that lets you see what's 140 feet under your feet.

另一个使之与众不同的东西是它的玻璃底面，它能让你看到脚下140英尺的高度。

It's about the length of two football fields across and at its highest point it has a glass bottom so you can see exactly what's 140 feet under your feet.

它有两个足球场那么长，最高处有一个玻璃底，所以你可以清楚地看到你脚下140英尺的东西。