sample changer

例句：

1. 1. The sample changer was used to test the new software.
   样本转换器被用来测试新的软件。
2. 2. The engineer used the sample changer to make adjustments to the machine.
   工程师使用样本转换器来调整机器。
3. 3. The sample changer helped us to identify the problem and fix it quickly.
   样本转换器帮助我们识别问题并迅速解决。