spontaneously

Science predicts that many different kinds of universe will be spontaneously created out of nothing.

霍：科学预言许多不同种类的宇宙会自发地从“无”中被创造出来。

The tendency of kids to split up spontaneously into subgroups also explains the uneven success rate of programs that put children from disadvantaged homes into private or parochial schools.

孩子有自发地分裂形成小团体的趋势，这也说明了将贫穷家庭孩子放入私人或教会学校的计划为什么成功率参差不齐。