重点讲解：
1. on board 在火车（或轮船、飞机）上；
The cargo on board have been damaged by sea water.
船上的货物因水湿而残损。
2. agree on 商定；议定；就…达成协议；
We agree on the question.
在这个问题上我们达成了共识。
3. intend to do sth. 想要；打算；计划；
From what I was able to glean, it appears they don't intend to take any action yet.
根据我所收集到的资料分析，他们看来还不打算采取任何行动。
4. be discharged from 允许…离开(医院、军队)；
My grandmother was discharged from the hospital this morning.
我奶奶今天上午出院了。