rule of thumb idiom
C1 实用的估测方法；经验之谈；经验法则
a practical and approximate way of doing or measuring something
A good rule of thumb is that a portion of rice is two handfuls. 有个方便实用的估算方法，即两把生米便是够一人吃的量。
江苏热线英汉汉英双解词典包含207361条英汉翻译词条，涵盖了常用英语单词及词组短语的翻译及用法，是英语学习的必备工具。