这台机器正在给金属板打孔以便安装螺钉。
The machine is ___perforating the metal sheet for screw installation.
这台钻孔机可以轻松穿透厚木板。
This drilling machine is capable of ___perforating thick wooden boards.
工人们正在给纸张打孔以便装订成册。
The workers are ___perforating the paper for binding into booklets.