two-way beam

例句：

1. 1.The two-way beam allows for easy communication between the two sides.
   双向光束使得双方之间的通信变得容易。
2. 2. The engineer used a two-way beam to test the new material.
   工程师使用双向光束来测试新材料。
3. 3.The two-way beam is crucial for maintaining safety in emergency situations.
   双向光束在紧急情况下对于保持安全至关重要。