After knowledge of the physical forces, their laws and their mutual relations, comes the question of their origin.
在了解物理力、它们的规律及相互关系之后,接下来是它们起源的问题。
Don't let anyone dull your sparkle.
最大的风险就是不冒任何风险。
我画的是被反射的光,而不是被接收的光。