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单词 order
释义 order
1 The number of times a variable is differentiated. dy/dx represents a first-order derivative, d2y/dx2 a second-order derivative, etc. In a differential equation the order of the highest derivative is the order of the equation.
d2y/dx2 + 2dy/dx = 0
is a second-order equation of the first degree. See also degree.
2(in physics) A category of phase transition.
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更新时间:2025/6/23 23:12:31