by rule of thumb
英
美
- by prep.靠近；通过；被；经由；不迟于adv.经过；在旁边；靠近
- of prep.关于；...的（表所属）；出身于；由于
- rule n.规则；条例；习惯；统治；直尺v.支配；统治；画直线
- thumb n.拇指v.翻阅；示意要求搭车
- They learn to cook by experience.
都是凭经验做的。
- But he never missed my breakfast and dinner, knowing by experience that he fared best there.
但是它从来都不会错过我的早餐和午餐，凭经验它知道在我这儿吃得最好。
