merchant navy
noun [ C or S ] UK uk/ˌmɜː.tʃənt ˈneɪ.vi/ us/ˌmɝː.tʃənt ˈneɪ.vi/ (US merchant marine)
商船船队
a country's ships that carry goods and are not used for military purposes
During this period of the war, the merchant navies came under increased attack. 在战争的这个时期，商船船队受到越来越多的攻击。
He spent twenty years in the Merchant Navy. 他在商船上工作了二十年。