您要查找的是不是：
- A spectral mask that horrifies all enemies in proximity, causing them to run in fear. 产生一个发光面具;恐吓周围的一切敌人;让他们在恐惧中逃跑.
- The Ultra-Wideband (UWB) pulse waveform in communication need not only achieve orthogonality but also meet the Federal Communications Commission (FCC) spectral mask for the UWB commercial system. 摘要超宽带(UWB)脉冲波形设计不仅要求满足正交性，还要满足UWB系统信号发射所要求的FCC频谱限制。
- He wore a mask so that no one should recognize him. 他戴了一个面罩，使别人认不出他来。
- Sham is sham and the mask must be stripped off. 假的就是假的，伪装应当剥去。
- He tried to mask his disappointment with a smile. 他试图以微笑来掩饰他的失望。
- The mask fitted tightly over his face. 他用面具把脸蒙得严严的。
- They did so under the mask of charity. 他们是打着慈善的幌子这么做的。
- Such feelings tend to remain submerge beneath a mask of social politeness. 在社交礼貌的掩盖下，这样的情感往往不会显露出来。
- spectral mask 频谱限制
- Adaptive spectral mask 自适应频谱模板
- Her sociable manner is really a mask for a very shy nature. 她那好交际的作风，实际上是她腼腆天性的伪装。
- For a moment his mask of benevolence fell and the real man was revealed. 一刹那间，他慈善的假面扔掉，露出了他的真面目。
- A base, ungenerous wretch who under the mask of friendship has undone me. 有个卑鄙、吝啬的家伙打着友谊的幌子把我毁了。
- A mask, in the character of an old woman, joined them. 一个戴着假面具扮演老妇的人加入了他们的行列。
- I am studying spectral classification. 我在学习光谱分类。
- He preserved his mask of solemnity even with acquaintances. 他甚至和熟人交往也保持着一本正经的面孔。
- Refracting light without spectral color separation. 消色差的，不分光的折射光没有光谱颜色分离的
- He conceals his worries behind a mask of nonchalance. 他装作若无其事，藉以掩饰内心的不安。
- An oxygen mask will come down from overhead in case of an emergency. 若发生紧急情况，头顶上会降下一只氧气面罩。
- To separate (light) into spectral rays. 使(光)色散
