zero sign

Use a negative sign to show that the value is less than zero.

用负号表示数值小于零.

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A square sign pattern matrix that does not have a zero row or zero column is sign potentially orthogonal ( SPO) if every pair of rows and every pair of columns allow orthogonality.

一个没有零行或零列的n阶符号模式矩阵是符号蕴含正交的，若每一对行和列向量都是蕴含正交的。

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The clumsy Roman numerals were ousted by the Arabic figures we use to this day, and the zero sign was first employed.

形状笨拙的罗马数字被我们一直沿用至今的阿拉伯数字所替代，并且第一次使用了零的符号。

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Do you see the sign for air u.s.seven zero seven?

你看到美国航空公司七零七次的标志了吗？

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