The growth status of rats, calcium contents in femurs, feces, urine, blood, and forage, weight and length of femur, phosphorus contents of blood were measured.
观察大鼠生长状况，检测大鼠股骨钙、粪钙、尿钙、血钙及饲料钙含量、股骨干重与长度、血磷含量。
A raccoon is this big a horse is about four times bigger so the length of the femur of a horse must be about four times the length of the raccoon.
浣熊的有这么大，而马的几乎是它的四倍，因此马股骨的长度必然约等于，浣熊股骨，长度的四倍。
So this will be the length of the femur d and this will be the thickness, d A and this will be the cross-sectional area A.
所以这就是股骨的长度,这是它的厚度,这是它的横截面积。
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