这个公式用于计算圆的面积。This formula is used to calculate the area of a circle.地球是圆的是常识.It is common knowledge that the earth is round.圆的直径与圆周有相互关系.The diameter and the circumference of a circle correlate....

“圆的”的英语可以翻译为：orbicular，rotund，[医] teres，round，circinal ...