从悬崖顶到地面的垂直距离大约有50英尺。

It's a ___drop of about 50 feet from the top of the cliff.

这位特技演员在跳下前测量了桥面到水面的垂直距离。

The daredevil measured the ___drop from the bridge before his jump.

消防员估计从三楼窗户到地面的垂直距离在可生存范围内。

The firefighter estimated the ___drop from the third-floor window to be survivable.