您要查找的是不是：
- beam reversing lens 光束返回透镜
- PEPC electro-optical switch used in beam reverser of multipass amplifier[J]. 引用该论文 张雄军;郑建刚;郑奎兴;董云;鲁敬平;彭志涛;景峰;魏晓峰.
- This lens can magnify 20 diameter. 这个透镜能放大20倍。
- She performed on the balance beam with much grace. 她在平衡木上表演得非常优美。
- Some adjustment of the lens may be necessary. 可能有必要调节一下镜头。
- Do you have soft contact lens care product? 有没有软性隐型眼镜保养用品？
- The beam of the searchlight pierced the darkness. 探照灯的光柱射入黑暗中。
- He uses lens to make things appear clearer. 他用镜片以便看东西更清楚些。
- His answer was right on the beam. 他的答案完全正确。
- The lens is often used to make telescopes. 镜片常被用来做成望远镜。
- An order or command reversing another one. 收回成命的命令与另一个相反的定货或命令
- Don't smear the lens; I've just polished it. 别把镜头弄脏了，我刚刚擦过。
- He struck the beam with his head. 他的头撞到梁上了。
- The beam has a thickness of 3 inches. 这根梁厚3英寸。
- Never heard of her. You're off the beam. 我从来没有听说过这个人，你搞错了吧。
- The camera lens must be screened from direct sunlight. 照相机的镜头不可受到阳光的直射。
- Mind you don't knock your head (on this low beam). 小心，别(让这根低梁)撞著头。
- She ran (ie drove) her car into a tree while reversing. 她倒车时撞著了一棵树。
- Sighted land off the starboard beam. 转向右舷方向便望见了陆地
- The gymnast poised herself on the balance beam. 体操运动员在平衡木上保持平衡。
