是高考必考单词,意思是双重的,例如:
1、The piece of furniture serves a dual purpose as a cupboard and as a table.这件家具有两个用途,既作橱柜也作饭桌。
2、She has dual nationality.她具有双重国籍。
3、Rob may be entitled to dual nationality.罗布或许能拥有双重国籍。