be on one´s guard for all possible dangers as though confronted by a formidable enemy as if one were facing a formidable enemy be prepared for any eventualities
After the police finds, archenemy, catch him immediately, regard as the major suspect sends Paris.
警察发觉后, 如临大敌, 马上把他抓起来, 当作重大嫌疑犯送到巴黎。
—— 给力词典精选