海关的英文：
customs

Customs service
海关服务台

The seizure of contraband by Customs officers
海关官员对违禁品的扣押.

When you enter the immigration and customs, they will ask to see your airline ticket and passport.
办海关入境手续的时候，他们要看你的机票和护照。

All departing passengers are requested to proceed to the customs and immigration now.
所有出境旅客现在请通过海关及证照查验关。

Within a Customs surveillance zone and the specified coastal or Border area in the vicinity of a Customs　establishment.
在海关监管区和海关附近沿海沿边规定地区。

For Customs Official Use Only
海关签注

Regulations on the Protection of Intellectual Property by Customs
《知识产权海关保护条例》

Customs officers are in charge of the customs inspection.
海关官员负责海关检查。

Bonding [customs]
担保，保税[海关]

The goods would be sequestered by the customs.
货物将被海关扣押。