单词	annulus
释义	annulus (annuli) The region between two concentric circles. If the circles have radii r and r + w, the area of the annulus is equal to , which equals . It is therefore the same as the area of a rectangle of width w and length equal to the circumference of the circle midway in size between the two original circles. An annulus
随便看	matrix game matrix groups matrix norm matrix of a linear map matrix of coefficients matrix of cofactors Maupertuis, Pierre‐Louis Moreau de maximal element maximal ideal maximal matching maximal torus maximin strategy maximum maximum likelihood estimator maximum modulus theorem Maxwell, James Clerk Maxwell's equations max‐flow/min‐cut mean mean absolute deviation mean curvature mean deviation mean squared deviation mean squared error mean value

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