know the ropes可不是“知道绳索”，真实含义是“懂行，懂得诀窍，在行，熟悉技巧”。

【例句】
The moment she got to know the ropes, there was no stopping her.
一旦她懂行了，就什么也难不住她了。

She is new here and still doesn't know the ropes.
她是新手，还不懂得诀窍。