查cruise ship 来源，觉得翻译成邮轮没错. 以前运货送邮件，后来才成为船旅游的特指

The term "cruise ship" originates from the 17th-century Dutch word kruisen, meaning "to cross" or "sail to and fro," which is derived from the Latin crux(cross).

The verb "cruise" (1650s) comes from kruisen, describing the crisscross pattern of sailing ships. By 1706, "cruise" was used as a noun for a voyage, and by 1906, it specifically described a "voyage taken by tourists on a ship"

The concept of leisure cruising began in the 19th century, with P&O (Peninsula and Oriental Steam Navigation Company) introducing passenger sea tours in 1844.

而早期的跨海邮件是通过蒸汽船运输的. 邮件是从一点到另一点. 送邮件同时载个人，后来人为主了.