一日一成语【164】know the ropes 对某事十分精通

ropes
[美俗]对某事十分精通

James really didn’t know the ropes when it came to driving.
对开车之事，詹姆斯一窍不通。

注解：
rope意指绳、索，the ropes意为内情；(to know the) ropes系指知道内情，喻指以某事十分精通。