环形
huán​xíng

annulus

  • created sense approved 环形/環形 · huán​xíng · annulus

    环形 / 環形

    huán​xíng

    annulus

    the mathematical area between the circumferences of two concentric circles

    老师解释了如何计算环形的面积。

    noun

    created sense

  • created sense approved 环形/環形 · huán​xíng · ring-shaped

    环形 / 環形

    huán​xíng

    ring-shaped

    having the form of a ring; circular or annular in shape

    这座城市有一条环形公路。

    noun

    created sense