radius

中文意思

• n. 半径
• n. 范围
• n. 辐射光线

英文释义

• n. the length of a line segment between the center and circumference of a circle or sphere
• n. a straight line from the center to the perimeter of a circle (or from the center to the surface of a sphere)
• n. a circular region whose area is indicated by the length of its radius
• n. the outer and slightly shorter of the two bones of the human forearm

词形变化

复数

radii

例句

1. n. 半径

   The math teacher drew a circle on the board and marked its radius.

   数学老师在黑板上画了一个圆，并标出了它的半径。

2. n. 范围

   There are several good restaurants within a two-mile radius of the hotel.

   酒店方圆两英里范围内有几家不错的餐厅。

3. n. 辐射光线

   The bright lamp emitted a strong radius of light through the dark night.

   明亮的台灯在黑夜中散发出强烈的辐射光线。