短缺乃是一种符号，它意味着价格被人为地保持在低于供求双方可以自由行事时的水平。
A shortage is a sign that somebody is keeping the price artificially lower than it would be if supply and demand were allowed to operate freely.
You have to be willing to make mistakes; the big thing is to not make the same mistake over and over again.
The best mathematics is timeless.
The story is not in the words; it's in the struggle.
The most damaging phrase in the language is: 'We've always done it this way.'
我只是尽力做到最好，保持积极。
