班轮在固定港口之间按固定航线航行，并提前发送信息。
Liner sails in the fixed route between fixed ports and sends sailing information in advance.
开往美国的货运飞机必须符合特定的安全要求，其中包括必须通过安全扫描以及工作人员的核定，还得向当局提前发送舱单。
Cargo shipped on planes to the United States must meet certain security requirements, including for screening, vetting of personnel in the facilities and providing advance manifests to authorities.
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