“自发的”造句

火山的爆发是自发的.
The eruption of a volcano is spontaneous.

我觉得他的热情有点勉强,缺乏自发的冲动.
His enthusiasm was somewhat lacking in spontaneity, I thought.

克诺普曼博士说: “ 舆论的改变不会是自发的,有人在那里操纵. ”
Dr Knopfmann said, " A shift in public opinion doesn't just happen. It's manufactured. "