dual
/ˈdul/ 形容词 C1中文： 双数
- Characterized by having two (usually equivalent) components. · a dual-motor vehicle
- Pertaining to two, pertaining to a pair of. · dual engine failure· dual citizenship
- Pertaining to a grammatical number in certain languages that refers to two of something, such as a pair of shoes. · Modern Arabic displays a dual number, as did Homeric Greek.
- Exhibiting duality.
- Being the space of all linear functionals of (some other space).
- Being the dual of some other category; containing the same objects but with source and target reversed for all morphisms.
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In his singular character the dual nature alternately asserted itself, and his extreme exactness and astuteness represented, as I have often thought, the reaction against the poetic and contemplative mood which occasionally predominated in him.
Built in Nova Scotia in 1921, the Bluenose was designed for a dual purpose.
The word in question possessed a dual meaning, simultaneously suggesting a profound melancholy and a tentative, burgeoning sense of hope.
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