procedure

The pilot performed the emergency landing procedure after the left engine failed mid-flight.

(Chinese) 飞行中左发动机故障后，飞行员执行了紧急降落程序。

Standard operating procedure requires all laboratory staff to wear protective goggles at all times.

(Chinese) 标准操作程序要求所有实验室工作人员必须全程佩戴护目镜。