单词give oneself away
na.: 露马脚
露馅;暴露身份,让自己泄露出来;使自己感情流露
散发;放出;发射出
It was merely a question of "good form, " the conceit of a superior breeding, the duty not to give oneself away.
这不过是“高尚体统”的问题,一种优越教养的自负,尽到不使自己感情流露的责任而已。