du.al
dual的音标和读音：
DJ音标发音： [ˈdu:əl, ˈdju:-]
KK音标发音： [ˈduəl, ˈdju-]
dual的词性：
adj.（形容词）
1. Composed of two usually like or complementary parts; double:
成双的：由两个通常相象或互补部分组成的；双的：
dual controls for pilot and copilot; a car with dual exhaust pipes.
飞行员与副飞行员复式操纵装置；有双排气管的汽车
2. Having a double character or purpose:
有双重特点或目的的：
a belief in the dual nature of reality.
认为现实具有二重本性的看法
3. Grammar Of, relating to, or being a number category that indicates two persons or things, as in Greek, Sanskrit, and Old English.
【语法】 双数的：指示两个人或物的数字范畴的，如希腊语，梵语与古英语中双数概念
dual的词性：
n.Grammar （名词）【语法】
4. The dual number.
双数
5. An inflected form of a noun, adjective, pronoun, or verb used with two items or people.
双数格：用于两个物体或人时名词、形容词、代词或动词的曲折变化词形
dual的词源：
6. Latin du3lis
拉丁语 du3lis
7. from duo [two] * see dwo-
源自 duo [二] *参见 dwo-
dual的词性：
adv.（副词）