单元面积 Element Area ; [计] cell area
灵敏元面积 Element ; Element Size/Type
像元面积 pixel areas
逻辑单元面积 total cell area
面积元素 [数] element of area ; areal element ; differential of area
面积元 [数] surface element
零面积单元诊断 Zero Area Elements Diagnostic
抗拉元件截面积 Strength member CSA
可塑性面积单元问题 MAUP ; modifiable areal unit problem
表面积元 surface element
一个平面物体的密度是每单位面积元的质量。
The density for a flat object would be the mass per unit area.
第一件事就是要求出面积元。
这里使用dS而不是dA，因为我习惯把dA看成是，坐标平面中的面积元，就像在二重积分中所做的那样，待会大家会了解。
I am using dS rather than dA because I still want to think of dA as maybe the area in one of the coordinate planes like the one we had in double integrals. You will see later where this comes in.
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