chemical supervision

例句：

1. 1. The chemical supervision department is responsible for monitoring the safety of chemicals in the workplace.
   化学监管部门负责监督工作场所化学品的安全。
2. 2. The new regulations require chemical supervision to be conducted before any work can begin.
   新的法规要求在开始任何工作之前进行化学监管。
3. 3. The chemical supervision system has been improved to ensure better safety measures are in place.
   化学监管系统已改进，以确保更好的安全措施到位。