speculative balances

例句：

1. 1. The stock market is a speculative market, where investors can make money by buying and selling stocks.
   股市是一个投机市场，投资者可以通过买卖股票来赚钱。
2. 2. The company's decision to invest in new technology was speculative, as there were no guarantees of success.
   公司决定投资新技术是投机性的，因为成功与否没有保证。
3. 3. The investment in renewable energy is speculative, as the returns are uncertain.
   对可再生能源的投资是投机性的，因为回报不确定。