medium heavy piece of cargo

例句：

1. 1. The temperature is medium.
   温度适中。
2. 2. The company uses a medium to store its data.
   该公司使用一种媒介来存储其数据。
3. 3. The book is an excellent medium for learning Chinese.
   这本书是学习汉语的绝佳媒介。
4. 1.The luggage was heavy and took up a lot of space.
   行李很重，占用了很多空间。
5. 2.The workload was heavy on her shoulders.
   工作负担重压在她的肩上。
6. 3.The rain made the ground heavy with mud.
   雨水使地面变得泥泞不堪。