gram atom

例句：

1. 1. The weight of the package is about 2 kilograms.
   这个包裹的重量大约是2公斤。
2. 2. Grains are a type of food made from seeds.
   谷物是一种由种子制成的食品类型。
3. 3. The farmer weighed the wheat to ensure it was within the standard gram limit.
   农民称量小麦以确保其符合标准克限制。