becH中的听力原句————if you don't cut it,you're toast pretty fast.

很难的句子.
cut it
俚语,做得到位,成功(verb) to be sufficient or adequate for a task,or generally.
toast
俚语,Destroyed,terminated,ceased functioning,ended abruptedly by external forces
if you don't cut it,you're toast pretty fast.
==如果你做得不成功的话,你会很快被贬得一文不值