He is good at masking his real character behind an assumed manner.

他善于用伪装的举止来饰其真正的性格。

It is taking hychroperoxides as masking agents, alumnium in titanium alloys was meascred with aluminon ammonium aurintri-carboxylate.

研究了以过氧化氢作为剂,用铝试剂测定钛合金中铝的方法。

If the hair graying is inreversible, hair colorant is the main choice for the masking of hair color change.

在无法逆转头发变灰的情况下，着色剂是恢复头发颜色的主要方法。