You don`t need a poleaxe to kill a chicken.

“杀鸡何必用宰牛？”

Steep mountain valley, cutting poleaxe cliff can be seen everywhere.

峡谷内山高路险、削斧悬崖随处可见。

I was poleaxed by this revelation.

我被所来事实惊得目瞪口呆。