n. 希腊字母的第17字
网络 视紫红质(rhodopsin); 视紫红质基因; 密度
Rho is a density, right?
ρ是密度,对吗?
So these two together, l times rho, give us mass per unit area.
这两个量,l乘以ρ,一起给出单位面积上的质量。
The total mass is the volume, which is the area times the length times rho.
总质量是体积,也就是面积乘以长度乘以密度。
OK, so if I have a point here, then rho will be the distance from the origin.
这里有个点,ρ表示它到原点的距离。
We tend to use the Greek letter rho, If you were to use Excel, it would be correl or sometimes I say corr.
我们习惯用希腊字母rho表示,如果你使用Excel,会用correl表示,有时我也用corr。