They calculated that a “waist-to-hip ratio” of 0.7, or a waist measuring 70 per cent of the hip circumference, was the “perfect” size.
他们还发现0.7的腰围/臀围比例是最完美的尺寸。
2
It's a mathematical constant representing the ratio of any circle's circumference to its diameter.
pai是一个数学常量，代表圆周长跟直径的比值。
3
She would see the same number of rulers involved as did observer a, and so would likewise conclude that the ratio of circumference to radius did not conform with Euclidean geometry.