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

“杀鸡何必用宰牛的刀呢？”

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

峡谷内山高路险、刀削斧劈的悬崖随处可见。

I was poleaxed by this revelation.

我被所揭示出来的事实惊得目瞪口呆。