dual.

常见例句

The road opened out into a dual carriageway.
这条路已扩展成了复式车行道。
His dual role as a composer and a conductor made him very busy.
他作曲家和指挥家的双重身份使他非常繁忙。
At that point, the road opens out and becomes a dual carriageway.
公路在那个地方变宽了，变成了双车道。
The training airplane has dual controls.
教练飞机有两套控制系统。
Dual function design saves money and space.
二合一设计可节省成本及空间。
But it too had a dual character.
但是它也有二重性。