gain curve of medium

例句：

1. 1. The gain curve of the stock market is closely related to the overall economic environment.
   股市的收益曲线与整体经济环境密切相关。
2. 2. The investment curve shows how much capital is needed to achieve a certain level of return.
   投资曲线显示了达到一定回报水平所需的资本量。
3. 3.The rise in oil prices has caused a significant shift in the gain curve for oil companies.
   油价上涨导致石油公司的收益曲线发生了显著变化。