spontaneouslyadv.自发地;自生地;自然产生地
spontaneousadj.自发的,自然的,本能的;自然产生的
spontaneous scattering自发散射
spontaneous conception自然妊娠
spontaneous hydrolysis自发水解
spontaneous regression自发性回归
spontaneous hemothorax自发性血胸
spontaneous adsorption自发吸附现象
spontaneous ionization自然电离
spontaneous nucleation自然结晶
spontaneous thick seam易燃厚煤层
spontaneous background自然本底