buy low and sell high

例句：

1. 1.We should buy low and sell high to maximize our profits.
   我们应该低价买入，高价卖出以最大化利润。
2. 2.The stock market is a great place to buy low and sell high.
   股票市场是一个低价买入、高价卖出的好地方。
3. 3. He decided to buy low and sell high in the stock market.
   他决定在股市中低价买入、高价卖出。