1、
The store detective had his eye on a group of boys who were acting suspiciously.
商店侦探留意着一群行为可疑的男孩子.
《简明英汉词典》
2、
The store detective was keeping a close eye on a suspected shoplifter.
商店的保安当时正严密监视一个可疑的商店扒手.
《简明英汉词典》
3、
4、
