spontaneous

自发的adjadj

1 spontaneous combustion自燃

2 spontaneous emission[电磁学]自发发射

3 spontaneous abortion自然流产；自发性流产

4 amplified spontaneous emission放大自发射；放大式自发射

5 spontaneous ignition自燃

6 spontaneous polarization自发极化；自然极化

7 spontaneous recovery自然回复（恢复）；自然痊愈

8 spontaneous radiation自发辐射

9 spontaneous magnetization自发磁化；自发磁化强度

1 The crowd gave a spontaneous cheer..人群自发地欢呼起来。

2 My spontaneous reaction was to run away..我的本能反应就是逃跑。