lower limit on the left

例句：

1. 1. The company's sales havereached a lower limit of $50million.
   该公司的销售额已达到5000万美元的最低限度。
2. 2. The projecthas a lower limit of 100 units per month.
   该项目每月的最低产量为100个单位。
3. 3. Thelower limit of the curve is the pointwhere the slope changes from positive to negative.
   曲线的下界是斜率从正变负的点。