area of a circle TEF/TCF常用TEF/TCF专四

圆面积 newarea of a circle的英文翻译是什么意思，词典释义与在线翻译：参考翻译圆的面积

To further understand the concept of a circle, distinguish the perimeter and the area of a circle.To further understand the concept of a circle, distinguish the perimeter and the area of a circle.

这些户外照明专门为边界安全照明设计，和传感器一起实现妥善地管理能源使用。