National frontier port的用法和樣例：
例句
- Sanitary supervision at frontier ports should be conducted under the direction of the health quarantine officials.
國境口岸衛生監督應在衛生檢疫官員的指導下進(jìn)行。 - Article 7 Persons and conveyances on entering the country shall be subject to quarantine inspection at designated places at the first frontier port of their arrival.
第七條入境的交通工具和人員，必須在最先到達的國境口岸的指定地點(diǎn)接受檢疫。
