adj. 二的；二重的；二体的；二元的。 dual personality 双重人格。 n. 【语法】双数；【数学】对偶。 the D- Monarchy 双重君主国〔指第一次世界大战前的奥匈帝国〕。
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"
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" 同义词：double, duple,
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"- R.W.Emerson; "every episode has its double and treble meaning"-Frederick Harrison 同义词：double, twofold, two-fold, treble, threefold, three-fold,
例句与用法
1.
The airplane had dual controls . 这架飞机有两套操纵装置。
2.
My dual position was, in fact, a handicap . 事实上，我的双重身份对我是一个不利因素。
3.
Theories serve a dual purpose . 理论有双重效果。
4.
This versatility comes from a dual weather influence . 这种多样性是由于双重的气候影响而形成的。
5.
Yet he went on trying to steer the ship of their dual life . 可他仍然试图驾驶他们双重生活的航船。
6.
The leghaemoglobin surrounding the bacteroids serves a dual role . 类菌体四周的豆血红蛋白执行双重职能。
7.
Both the dual and complement of such functions are also threshold function . 一个函数的对偶及都是临界值函数。
8.
This dual tug is apparent in the whole movement of expatriation . 这种两面周旋的态度在整个寄居海外运动中极为明显。
9.
The people 's republic of china does not recognize dual nationality for any chinese national . 中华人民共和国不承认中国公民具有双重国籍。
10.
The dual carburetor has a float bowl that partly surrounds the carburetor air horn . 双浮子气化器有一个浮子室，它局部环绕着化油器的空气室。
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