1. 双重的，二重的，两重的
2. 双的，两的，二的，成双的
3. 双倍的
4. 二体的
5. 二元的
6. 两部份的
7. 对偶的
8. 复式的，两层的

1. 双数
2. 双数词，含有双数的词
3. 【语法】双数
4. 【数】对偶
5. 双联
6. 二元

1. 使双重，使成双

1. consisting of or involving two parts or components usually in pairs;

   "an egg with a double yolk"
   "a double (binary) star"
   "double doors"
   "dual controls for pilot and copilot"
   "duple (or double) time consists of two (or a multiple of two) beats to a measure"
   

2. having more than one decidedly dissimilar aspects or qualities;

   "a double (or dual) role for an actor"
   "the office of a clergyman is twofold; public preaching and private influence"
   "every episode has its double and treble meaning"
   

3. a grammatical number category referring to two items or units as opposed to one item (singular) or more than two items (plural);

   "ancient Greek had the dual form but it has merged with the plural form in modern Greek"
   

1.两部分的;双重的;双的
Dual means having two parts, functions, or aspects.

e.g. ...hisdual role as head of the party and head of state...
他作为政党领袖和国家元首的双重身份
e.g. Rob may be entitled todual nationality.
罗布或许能拥有双重国籍。

1. He has dual role as director and actor.
   他兼作导演及演员的双重身份。
2. The film star has dual nationality.
   这位电影明星兼有双重国籍。

• dual citizenship双重国籍，双重公民身...
• dual carriageway双线车道
• dual track双声道
• dual.=dynamic u...
• dual-purpose双重目的的
• dual burner可用两种燃料的燃烧器...
• dual cone双纸盆,对偶锥...
• dual problem成对问题
• dual detector双向检波器
• dual access双臂取数,双臂存取...
• dual economy双重经济体制...
• dual drive双驱动器
• dual nationality双重国籍
• dual control对偶控制
• dual operation对偶运算,双重操作...
• dual network对偶网络,对偶电路,...
• dual beam双电子束
• dual pump复式泵,双缸泵...
• dual mode两种方式,双重方法...
• dual property二象性

• ☆ 16世纪进入英语，直接源自拉丁语的dualis，意为双的，二重的。