Annulus的结果
Annulus
(n.)
A ring; a ringlike part or space.
Annulus
(n.)
A space contained between the circumferences of two circles, one within the other.
Annulus
(n.)
The solid formed by a circle revolving around a line which is the plane of the circle but does not cut it.
Annulus
(n.)
Ring-shaped structures or markings, found in, or upon, various animals.