overspeculate

例句：

1. 1. He overspeculated on the stock market and lost a lot of money.
   他在股市上过度投机，损失了很多钱。
2. 2. The company's overspeculation in the new technology sector led to financial difficulties.
   该公司在新技术领域的过度投机导致了财务困难。
3. 3. The investor was accused of overspeculating in the stock market, leading to losses.
   这位投资者因在股市上的过度投机而遭受损失，被指控有罪。