tool for weighing medicine in ancient China

例句：

1. 1. He used a hammer to fix the door.
   他用锤子修好了门。
2. 2. The scientist uses various tools for his experiments.
   这位科学家使用各种工具进行他的实验。
3. 3. The carpenter used a saw to cut the wood.
   木匠用锯子切木头。