1、Be careful not to bump your head on the beam when you stand up.
當心站起來時頭別撞了橫梁。

2、On dark night, some of the boys asked him to climb up on the beam of their flashlight.
在一個漆黑的夜晚，孩子們讓他順著手電筒的光柱往上爬。

3、Watching her performance on the beam is a real pleasure.
觀看她在平衡木上的動作簡直是一大享受。

4、I have an idea. I'll shine my flashlight, and you can climb down on the beam of light.
我也有個主意，我點著手電筒，你可以沿著燈柱爬下去。

5、Study on the Beam Quality of DPL
DPL激光器光束質(zhì)量研究

on the beam翻譯