not planned but done because you suddenly want to do it 自发的；非筹划安排的 Oxford Collocations Dictionaryverbs- appear
- be
- seem
- …
- genuinely
- quite
- totally
- …
often doing things without planning to, because you suddenly want to do them 常心血来潮的 Jo's a cheerful, spontaneous person, always ready for some fun. 乔是一个开朗、率性的人，总是乐于助人。
- (specialist)
happening naturally, without being made to happen 自发的；自然的；自身造成的 spontaneous remission of the disease 疾病的自然缓解
done naturally, without being forced, practised or organized in advance 自然的；非勉强的；无雕饰的 a recording of spontaneous speech 自发讲话的录音 a wonderfully spontaneous performance of the piece 对那支乐曲极其淳朴自然的演奏
Word Originmid 17th cent.: from late Latin spontaneus (from (sua) sponte ‘of (one's) own accord’) + -ous.