砝码

例句：

1. 1. The chemist used a weight to measure the amount of substance.
   化学家使用一个重量来测量物质的量。
2. 2. The scales were balanced on the scales.
   秤杆平衡在秤上。
3. 3. The scales are used in many different ways to weigh things.
   秤有多种不同的用途，用来称量东西。