customs pass

例句：

1. 1.We need to obtain a customs pass before we can enter the country.
   我们需要获得一个海关通行证才能进入这个国家。
2. 2. The customs officer asked for my passport and customs pass.
   海关官员要求我出示护照和海关通行证。
3. 3.Without a valid customs pass, I cannot travel abroad.
   没有有效的海关通行证，我不能出国旅行。