Don't watch the clock; do what it does. Keep going.
We should forget about small efficiencies, say about 97% of the time: premature optimization is the root of all evil.
解释:大部分药材都以新鲜为好,但艾草却以陈年的为佳,体现了药材使用的特殊性。
理解一个问题就是答案的一半。
"The most important thing in life is to keep moving forward."