名詞 radius:

1. the length of a line segment between the center and circumference of a circle or sphere
   同義詞：radius, r
2. a straight line from the center to the perimeter of a circle (or from the center to the surface of a sphere)
   同義詞：radius
3. a circular region whose area is indicated by the length of its radius
   同義詞：radius
4. the outer and slightly shorter of the two bones of the human forearm
   同義詞：radius
5. support consisting of a radial member of a wheel joining the hub to the rim
   同義詞：spoke, wheel spoke, radius

1. The radius of a circle described by a crank, cam, or similar machine part.
   (曲軸的)半徑曲柄、凸輪或類似機(jī)器部件形成的圓的半徑
2. We can compute the circular area with radius.
   我們能用半徑計(jì)算出圓的面積。
3. The police searched all the woods within a six-mile radius.
   警察搜索了在周圍六英里以內(nèi)的樹林各處。