She was detected in a fraud.
她行骗被人觉察。
The thief was detected in the act of stealing.
那小偷正在行窃时被当场发现。
to be detected in (doing wrong)
干(坏事)被发现
英汉双解词典包含483723条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。