一个毁坏土壤的国家就是在毁灭自己。森林是我们土地的肺,净化空气并给我们的人民以新的力量。
The most important thing in mathematics is to understand the concepts, not just to memorize formulas.
You don't have to be great to start, but you have to start to be great.
结合仓储式零售与娱乐化体验的模式