snaffle bit

1. You put a snaffle bit on her before she brings the whole thing down.
   她把所有事搞砸之前你得给她戴上马嚼子。
2. The main contact with the horse's mouth must be through the snaffle bit.
   与马嘴主要的接触一定是在小口衔。

noun

1. a simple jointed bit for a horse

   Synonym:    snaffle