偷偷摸摸的用英语怎么说？

偷偷摸摸的

例句

• The teacher was suspicious of the student’s furtive behaviour during the exam. 老师怀疑这个学生在考试时有偷偷摸摸的行为。
• Covert action was deniable; a Pentagon program would not be ( Bob Woodward ) 偷偷摸摸的行动是可以否认的; 而五角大楼的行动却是有目共睹的 ( 鲍勃伍德沃德 )
• Such surreptitious bypassing of Standlely was distasteful. 这种偷偷摸摸的绕过斯坦德莱的做法令人厌恶.