This formula is used to calculate the area of a circle.
这个公式用于计算圆的面积。
Conservationists calculate that hundreds of species could be lost in this area.
自然资源保护主义者预测，数以百计的物种可能会从这个地区消失。
Therefore, spend some time to measure your painting surface to calculate its area.
因此，花一些时间来测量你的涂装表面，以计算出它的面积。
Calculate or analyze the painting area and painting cost for the new component.
为喷涂线计算和分析喷涂面积和喷涂成本。
The direct exchanging area is essential for zone method to calculate radiative heat transfer.
直接交换面积是区域法计算辐射传热的基础数据。
Using computer to calculate forest base area instead of drawing can raise efficiency and precision.
本文用计算器计算的方法代替作图，求算面积，可提高效率和精度。
Who knows how to calculate the area of a triangle, please raise your hand.
谁知道如何计算三角形的面积，请举手。
Who knows how to calculate the area of a triangle, please raise your hand.
谁知道如何计算三角形的面积，请举手。
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