scale pair

例句：

1. 1. The engineer used a scale pair to measure the dimensions of the new building.
   工程师使用比例尺测量新建筑的尺寸。
2. 2. The artist drew a pair of scales on the canvas to show the proportions of the painting.
   艺术家在画布上画了一对比例尺，以显示画作的比例。
3. 3. The scientist used a pair of scales to weigh the samples for their experiments.
   科学家使用一对秤来称量样本进行实验。