up and down test method

例句：

1. 1. Theup-and-down test method is widely used in the field of quality control.
   上下测试方法在质量控制领域广泛使用。
2. 2. The up-and-down test method was developed to improve the accuracy of measurements.
   上下测试方法被开发出来以提高测量的准确性。
3. 3. The up-and-down test method has been proven to be more effective than traditional methods.
   上下测试方法已被证明比传统方法更有效。