rub

其他意思

1. n. 摩擦, 困難, 障礙, 磨損處

   Rub is used in expressions such as there's the rub and the rub is when you are mentioning a difficulty that makes something hard or impossible to achieve.[FORMAL]

   • `What do you want to write about?'. And there was the rub, because I didn't yet know.

2. v. 擦, 搓, 摩擦, 惹怒
   摩擦, 擦破

   If you rub a part of your body, you move your hand or fingers backwards and forwards over it while pressing firmly.

   • He rubbed his arms and stiff legs