instruments weight

例句：

1. 1.The car weighs 2000 kilograms.
   这辆车重2000公斤。
2. 2. The weight of the earth is approximately 6.7 billion tons.
   地球的重量大约是67亿公吨。
3. 3. The weight of the package was too much for me to carry.
   这个包裹的重量对我来说太重了，我搬不动。