spontaneously
adv. 自发地；自生地；自然产生地
近义词：impulsively，ofyourownaccord，instinctively，unprompted，naturally，freely，suddenly，unexpectedly，impromptu，adlibitum，adlib，
英英释义
Adverb
- in a spontaneous manner;
"this shift occurs spontaneously"
- without advance preparation;
"he spoke ad lib"
例句
用作副词(adv.)
- Heat never flows spontaneously from a cooler to a hotter body.热决不会自发地从低温物体流向高温物体。
- A group of people got together spontaneously at the scene of the accident.一群人自发地聚集在事故现场。