adj.自发的,自然的,本能的;自然产生的
He is spontaneous to offer help. 他主动提供帮助。
It is a spontaneous cheer from the crowd. 那是群众自发的喝彩。
The spontaneous applause cut the singer short. 自发的掌声打断了歌唱家的演唱。
The spontaneous combustion of the oil-soaked rags caused the barn to catch fire. 油布碎片的自燃使谷仓起火。
adv.自发地;自生地;自然产生地
n.自发(自生;自然产生;自然;天然)