淹灌
basin irrigation (e.g. paddy fields)
验关
customs inspection (at frontier)
眼观六路耳听八方
lit. the eyes watch six roads and the ears listen in all directions; to be observant and alert (idiom)
眼观四处,耳听八方
see 眼觀四面,耳聽八方|眼观四面,耳听八方[yan3 guan1 si4 mian4 , er3 ting1 ba1 fang1]
眼观四面,耳听八方
lit. the eyes observe all sides and the ears listen in all directions (idiom); fig. to be observant and alert
察言观色
to weigh up sb's words and observe their facial expression (idiom); to discern what sb thinks from his body language
听其言观其行
hear what he says and observe what he does (idiom, from Analects); judge a person not by his words, but by his actions
肉眼观察
observation by naked eye