mask1/mæsk; mɑːsk/n [C] something that covers all or part of your face in order to protect or hide it 面具﹔面罩﹔口罩: He was robbed by two men wearing masks . 他被两个蒙面男子抢劫了。
mask2v [T] to prevent a smell, taste, sound etc from being noticed 遮盖,掩盖〔气味﹑味道﹑声音等〕: The sugar masks the taste of the medicine. 糖盖住了药的味道。