个人理解哈,dump更像是一个“扔”的动作,用于一些较为具体的情况。
They dump the trash.
We dump her body in the sea.
是拿了一个物理实体然后给撇下去的感觉
而discard在dump的基础上更具有抽象意义,丢弃的不一定是一个物理实体
No matter what happened, don't discard your faith.
You must discard any thoughts of giving in and continuously march forward.
I discarded all of my old clothes yesterday(也可以是实体