pack chromizing medium

例句：

1. 1.We need to pack our bags and leavefor the airport immediately.
   我们需要打包行李，立即动身去机场。
2. 2. The box was packedwith books and papers.
   这个箱子里装满了书和文件。
3. 3. The car was packedwith people and luggage.
   这辆车上挤满了人和行李。