so as not to ...

• 以便不 ...

so as not to ...的用法和样例：

例句

1. He affected illness so that he need not go to work.
   他装病以便不去上班。
2. The length of any leg of a speed course should be long enough so that inadvertent timing errors do not introduce appreciable errors into calculated speed.
   速度课程的任何腿的长度应该够长的，以便不注意的时间安排错误不引导可感知的错误进入有计划的速度。