From the curl of a ram's horn to patterns of spider webs and the development of an embryo, Mr Ball examines the possible causes of the shapes and forms we observe.
从弯曲的公羊角到蜘蛛网的图形以及胚胎发育，波尔先生解释了我们能观察到的图形及形状可能的成因。
2
It is actually hard to draw the shoulders well, the human body should look like a box, but the shoulders extrude as ballshapes.
肩膀想要画得漂亮其实不是很容易的，本身人体应该是块板子，但肩头的部分则呈球状的突出。
3
The paper researches one of the key techniques of the cycloid steel ball reducer, that is the synthesis of conjugate waves shapes for no gear clearance engagement pair.