那人是非分辨不清。
Some people find it difficult to discern between blue and green.

有些人很難分辨藍色與綠色。
Even lawyers cannot always discern between fine points of the law.

即使律師也并不總能對法律中的那些細節進行區別。 discern sth between sth
It is easy to discern a connection between high rents and the lack of housing.

顯而易見,高房租和住房缺乏是彼此相關的。
How can we discern the difference between two books in a dark room?

在黑屋子里,我們怎么能看出兩本書的不同?

那人不能辨別善惡。
Some people find it difficult to discern blue from green.

有些人很難分辨藍色與綠色。
Even the police cannot always discern truth from lies.

即使警察也并不總能區別真話與謊言。