double-barrelled
/ˈdʌblˈbærəld/adjective
1- (of a gun) having two barrels（枪炮）双管的。
1.1
- having two parts or aspects有两个部分（或方面）的。
1.2
- Brit. (of a surname) having two parts joined by a hyphen〈英〉（姓氏）由（用连字符连接的）两部分组成的, 双的。