Remember how disappointed you were when I explained the neverending hanky?
还记得我解释了那个魔术" 永不结束的手绢" 之后你有多失望吗?
Crash Course 解剖生理学篇
The answer is a neverending series of reactions that are dedicated to doing two vital, and totally contradictory, things: One set of chemical reactions destroys the reactants that you give them, reducing big, complex substances into molecular rubble.