0 a covering for all or part of the face that protects, hides, or decorates the person wearing it -- 面具，面罩
1 appearance or behaviour that hides the truth -- 掩饰；伪装
The newspaper revealed the sordid truth behind his mask of respectability. 报纸揭露了他体面外表下龌龊肮脏的真实嘴脸。
2 to prevent something from being seen or noticed -- 掩饰；掩盖；遮蔽
The mask was so lifelike it was quite frightening.
We had to wear a protective mask and goggles.
The attitude towards masks is another example; in different areas of the state they are viewed in completely different manner.
Furthermore, the general improvement in levels of imperial trade masked important regional variations between overseas territories and within individual colonies.
Further, the identities were masked - that is, judges were not provided with information regarding the authorship of a summary and of questions.
Cereal yields, as indicators of output, fluctuated over the period of the trial, masking any possible long-term change.
Thus, the masking effect of a wild-type allele does not appear to be very strong when weakly deleterious mutations are considered.
