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del 音標拼音: [d'ɛl] 鍵盤上的一個輔助鍵,
n. DOS命令:刪除文件 鍵盤上的一個輔助鍵,DOS命令:刪除文件 Del \Del\, n. [See {Deal}, n.]
Share; portion; part. [Obs.] --Chaucer. [1913 Webster] del \del\ n. (Math.) a differential operator which, operating on a function of several variables, gives the sum of the partial derivatives of the function with respect to the three orthogonal spatial coordinates; -- also called the {gradient} or {grad}. It is represented by an inverted Greek capital delta ([nabla]), and is thus because of its shape also called {nabla}, meaning harp in Hebrew. [PJC] |
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