dual: [17] Dual was borrowed from Latin duālis, a derivative of duo ‘two’ (which is a distant relative of English two). In Latin it was used particularly by grammarians, to denote the category ‘two people or things’ (as opposed to the plural, referring to three or more), and this was the earliest sense of the word adopted by English. (Incidentally, despite its formal similarity, and a common meaning element – two people participate – duel [15] is not etymologically related to dual; it comes from medieval Latin duellum, which was originally an archaic form of Latin bellum ‘war’. => two
dual (adj.)
c. 1600, from Latin dualis, from duo "two" (see two). Related: Dually.
雙語例句
1. his dual role as composer and conductor
他兼任作曲家和指揮的雙重角色
來自《權威詞典》
2. He has dual role as composer and conductor.
他兼作曲家及指揮的雙重身分.
來自《簡明英漢詞典》
3. The airplane had dual controls.
這架飛機有兩套操縱裝置.
來自《現代漢英綜合大詞典》
4. The reason for the discount is the use of dual - class shares.
存在折價率問題的原因是雙重投票權股票(dual -classshares )的使用.
來自互聯網
5. A safety alert system by DTMF ( Dual - tone multifrequency ) mode is introduced.