dual

US /ˈduː.əl/
UK /ˈduː.əl/
"dual" picture
1.

双重的, 双份的

consisting of two parts, elements, or aspects

:
•
The car has a dual exhaust system.
这辆车有双排气系统。
•
She has dual nationality.
她拥有双重国籍。
:
doubletwofoldtwinbinarybipartite
:
dual controls