从城堡的墙壁到下方的河流，有30米的垂直落差。

There's a sheer ___drop of 30 metres from the castle walls to the river below.

跳水台到泳池水面有整整十米的垂直距离。

The diving platform has a ___drop of exactly ten metres into the pool.

小心点，从这个脚手架到地面的垂直距离可不小。

Be careful; the ___drop from this scaffolding to the ground is significant.