rule of thumb

例句：

1. 1.I'll make a decision based on the rule of thumb that we've been using for years.
   我将根据我们多年来一直使用的大致规则来做决定。
2. 2. The engineer used the rule of thumb to estimate the time it would take to complete the project.
   工程师根据经验法则估算完成这个项目所需的时间。
3. 3.The manager suggested that they follow the rule of thumb and not worry too much about the details.
   经理建议他们遵循经验法则，不要过于担心细节。