a hole in the ground dug by a rabbit

He broke his ankle when his foot got caught in a rabbit hole. 他踩到兔子洞扭伤了脚踝。

See also: burrow noun

a situation in which you become so interested in a subject or an activity that you cannot stop trying to find out about it or doing it

I know when I read a WWI novel I inevitably end up down a rabbit hole researching the war. 我知道我一读一战的小说就无可避免地深陷于对这场战争的研究之中无法自拔。

You can kind of find yourself getting sucked into various attention rabbit holes. 你有可能会发现自己受到各种关注，无法脱身。