dual
/ˈdul/ 名词 C2中文： 双数、对偶
- Of an item that is one of a pair, the other item in the pair.
- Of a regular polyhedron with V vertices and F faces, the regular polyhedron having F vertices and V faces. · The octahedron is the dual of the cube. The icosahedron is the dual of the dodecahedron.
- The dual number.
- Of a vector in an inner product space, the linear functional corresponding to taking the inner product with that vector. The set of all duals is a vector space called the dual space.
- A head-to-head match or meet between two teams, such as two high schools or colleges.
复数 duals
来自图书馆
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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