Annulus
volume
British pronunciation/ɐnˈuːluːz/
American pronunciation/ɐnˈuːluːz/

"annulus" 的定义和意义

Annulus
01

环带

(Fungi) a remnant of the partial veil that in mature mushrooms surrounds the stem like a collar
02

环形

a mathematical shape formed by the region between two concentric circles in a plane
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