Now drag is proportional to cross sectional area, so it scales with radius squared, whereas weight scales with radius cubed.

现在阻力与横截面积成正比，因此它与半径的平方成比例，而重量与半径的立方成比例。

So a group of researchers in the U.K. wanted to know, do British teens have an accurate sense of where they fall along the weight scale?

因此英国的研究者们想要了解自己国家的青少年们对体重问题是否自始至终有一种确切的感受？

Your goal isn't to see that number on the weight scale go up or down, which can cause a lot of headache and demotivation if it doesn't.

你的目标不是看到体重秤上的数字上升或下降，而且如果看不到这样的结果，你会觉得很头痛并失去动力。