load circuit efficiency

例句：

1. 1. The truck is loaded with goods for the journey.
   这辆卡车装满了货物准备出发。
2. 2. The train was loaded with passengers before leaving.
   火车在离开前装载了乘客。
3. 3. The box was loaded with books and papers.
   这个箱子里装满了书和文件。