overload series transformator

例句：

1. 1.The truck was overloaded with heavy boxes.
   这辆卡车被重重的箱子超载了。
2. 2.The workload is too much for him to handle.
   他的工作量太大了，无法处理。
3. 3. The overloaded train caused a derailment.
   超载的火车导致出轨。