永无止境

Explanation: End to end. Never coming to an end time. 　　Usage: Verb-object type; as predicate, object; with compliment 　　Source: Mao Dun's "Night of the Qinling Mountains," there is snow on the Qinling Mountains, the Qinling Lan barrier layer like forever. " 　　Examples: Pursuit of truth ~. Thesaurus:  Xuehai boundless, never too old to learn, Zhiye boundless