自发的,无意识的 done,happening,said,etc. because of a voluntary impulse from within,not caused or suggested by sb/sth outside
自然的,天真率直的 natural,not forced
词汇搭配
～+名词
spontaneous applause 自发的鼓掌
spontaneous gaiety of manner 天真愉快的神态
句型例句
用作定语
▲～+n.
Her successful jump brought a spontaneous cheer from the crowd.她成功越过横竿后,观众立即发出一阵欢呼声。
用作表语
▲S+be+～
The eruption of a volcano is spontaneous.火山的爆发是自发的。
补充资料
［派生词］ spontaneously adv. 自发地‖spontaneousness n. 自发，主动
