邮局工作人员用机器在邮票上打孔以便撕开。

The postal worker uses a machine to ___perforate the stamps for easy separation.

医生用针在纸上穿孔以便装订。

The doctor used a needle to ___perforate the paper for binding.

这台机器可以自动在纸张上打孔以便装订。

This machine automatically ___perforates the paper for easy binding.