v.  背叛〔信任你的人〕；对…不忠；出卖

v.  背叛〔国家、公司等〕

v.  流露〔想掩饰的情感〕；暴露〔不易发觉的东西〕≈ give out

• betrayal  n. 背叛，出卖

• betray your beliefs/principles/ideals 

  背弃自己的信仰/原则/理想

• betray state secrets  泄露国家机密

• He felt that she had betrayed him.

  他感觉她背叛了自己。

• His face betrayed nothing. 他不露声色。

• The slightest sound might betray his presence. 稍有动静便有可能暴露他的存在。

• She was terrified of saying something that would make her betray herself.

  她害怕说话时泄了自己的底。

• She felt a great sense of betrayal.

  她有一种强烈的被出卖的感觉。