If the ratio is higher than that, the densest possible pack requires that some of the spheres pack in the middle without touching the cylinder's walls, and that is "more complicated," Chan says.
陈认为如果比例超过上限，要想包装紧密就必须使中间的一些球体不接触圆柱壁，更加复杂。
2
Jackie Chan to see child psychology, men tend to be more eager than women, middle-aged men often fear their children can not reach them on view, in an ongoing spirit of burden.