make a killing

例句：

1. 1. He'salways looking for ways to make a killing in the stock market.
   他总是在寻找方法在股市中赚大钱。
2. 2.She decided to make a killing by selling her old clothes online.
   她决定通过在网上卖旧衣服来赚大钱。
3. 3.The businessman made a killing by investing in real estate.
   这位商人通过投资房地产赚了很多钱。