effective height

例句：

1. 1.The engineer designed a new building with an effective height of 20 meters.
   工程师设计了一座新建筑，有效高度为20米。
2. 2. The taller trees have a higher effective height than the shorter ones.
   较高的树木具有比矮小树木更高的有效高度。
3. 3.The company's policy on effective height is to ensure that employees do not exceed the maximum height limit.
   公司关于有效高度的政策是确保员工不超过最高限制高度。