dou·ble-bar·relled
adjective/ˌdʌbl ˈbærəld/
/ˌdʌbl ˈbærəld/
(US English double-barreled)
[usually before noun]- (of a gun) having two barrels (= places where the bullets come out)
双管的 - (British English) (of a family name) having two parts, sometimes joined by a hyphen, for example ‘Day-Lewis’
由两部分组成的 - (of a plan, etc.) having two parts, and therefore likely to be effective
双重目的的；双作用的