instruction of technical operation

例句：

1. 1. The teacher gavethe students some instructions on how to solvethe problem.
   老师给学生一些指示，告诉他们如何解决这个问题。
2. 2. He followed the instructions carefully andcompleted the task successfully.
   他仔细地按照指示完成了任务。
3. 3. The doctor gave me someinstructions on what to do if I feltunwell.
   医生给我一些指示，告诉我如果感觉不适应该怎么做。