laser earthquake alarm

例句：

1. 1. The laser scanner is used to create 3D models of objects.
   激光扫描仪用于创建物体的三维模型。
2. 2. The laser beam was directed at the target.
   激光束被指向目标。
3. 3. The laser has a very high power and can be used for cutting metals.
   激光具有很高的功率，可以用于切割金属。