spring up
phrasal verb with spring verb [ I usually + adv/prep ] uk/sprɪŋ/ us/sprɪŋ/ sprang or sprung | sprung
突然出现；涌现
to start to exist suddenly
Thousands of new businesses have sprung up in the past couple of years. 过去几年里数千家新企业如雨后春笋般涌现出来。