hackn.劈或砍；乱踢；咳嗽n.供出租的马车；雇佣文人；（美口）出租车vt.非法侵入(他人计算机系统)vi.劈或砍；咳嗽hacklevn.颈羽；梳麻机；蝇钩；[复数](特指犬发怒时)颈背部竖起的毛

1. The log was rent to pieces by a circular sawing machine.
   原木被圆锯床锯成许多块。