掩蔽

例句：

1. 1. She put on a mask tohide her identity.
   她戴上面具以隐藏自己的身份。
2. 2. The actor wore a mask during theperformance.
   演员在表演中戴了面具。
3. 3. Hecovered his face with a mask to avoidrecognition.
   他用手遮住脸以避免被认出。