Bertrand curve

例句：

1. 1. This graph shows the relationship between two variables, which is a Bertrand curve.
   这个图表显示了两个变量之间的关系，这是一个伯特兰曲线。
2. 2.The Bertrand curve illustrates the trade-off between risk and return in investment decisions.
   伯特兰曲线展示了投资决策中风险与回报的权衡。
3. 3. The Bertrand curve suggests that investors should consider their risk tolerance when making investment choices.
   伯特兰曲线表明，投资者在做出投资选择时应考虑他们的风险承受能力。