butt on造句怎么写

Those unhappy children who lived for years in fear of the beating of a rifle butt on their door;

Xiao Xiaohua loves to walk around in crowded places. When she sees a cigarette butt on the ground, she immediately reaches out to pick it up.

The technical difficulty of mercury-free for alkaline Zn-MnO2 butt on cells was introduced.

He stamped his butt on the floor.

It's like seeing a smoker throwing a burning cigarette butt on the green grass and polluting nature.