boatswain的复数形式怎么拼写？

The head of Job Anderson , the boatswain, appeared at the middle loophole.水手长 乔伯 -安德森的脑袋出现在了中间那个枪眼里.Boatswain's and carpenter's tools over and above the Builder's standard.超出建造方标准的额外的水手长和木工工具.We thought th...

n.水手长...

boatswain的音标：boatswain的英式发音音标为：['bəʊsn]boatswain的美式发音音标为：['boʊsn]...