懂行的英文：
to know the ropes

参考例句：

Is it discharging its duty to diversity by printing snippets of opinion from unqualified readers?
难道通过刊登不懂行的读者的片断见解就算尽到了应有多样性见解的职责了吗？

know是什么意思：
v. 知道，了解，懂得；认识，熟悉；认出；体验；见到过，听到过

Learn not and know not
不学无术

Know/not know what is most important and act accordingly
能[不能]按轻重缓急行事

Do you know that lady?
你认识那位夫人吗？

Do you know the Hallelujah Chorus?
你知道哈利路亚合唱曲吗？

Few know and few care.
很少有人知道，也很少有人关心。

ropes是什么意思：
n. 绳子，绳索；串在一起的相似的东西
v. 用绳子捆；用套索抓捕…

Loop the tree with a rope = loop a rope around the tree
将绳子卷绕于树

She bought a rope of onions.
她买了一串洋葱。

Stretch the rope tight, please.
请把绳子拉紧。

The rope seems to bend down.
那个绳索看起来要向下延伸。

His political career is on the ropes.
他的政治生涯几近完结。