spon·ta·ne·ous /spɒnˈteɪniəs $ spɑːn-/ ●○○ adjectiveadj 1 PLAN#something that is spontaneous has not been planned or organized, but happens by itself, or because you suddenly feel you want to do it 自发的,自然而生的;一时冲动的 The crowd gave a spontaneous cheer. 人群自发地欢呼起来。
My spontaneous reaction was to run away. 我的本能反应就是逃跑。
2. someone who is spontaneous does things without planning them first – used to show approval 天真率直的,率性的〔含褒义〕 —spontaneously adverbadv She laughed spontaneously. 她不由得笑了。
—spontaneity /ˌspɒntˈniːəti, -ˈneɪəti $ ˌspɑːn-/ noun [uncountableU]