performed or occurring as a result of a sudden inner impulse or inclination and without premeditation or external stimulus
自发的,不由自主的
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the audience broke into spontaneous applause 观众们情不自禁地热烈鼓掌
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a spontaneous display of affection. 爱意的自然流露。
(of a person)having an open, natural, and uninhibited manner
(人)天真率直的。
(of a process or event)occurring without apparent external cause
(程序,事件)自发的,自然的
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spontaneous miscarriages .自然流产。
〈古〉 (植物)自生的,野生的,非人工栽培的。
【生】 (机体活动)本能的;自发的
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the spontaneous mechanical activity of circular smooth muscle .环状平滑肌的自然机械活动。
"mid 17th cent.: from late Latin