一个中介可以与一个或多个目的地相关，而且在消息到达该目的地时立即被调用。
A mediation is associated with one or more destinations, and will be invoked as soon as a message arrives at that destination.
不管你是到达了目的地，还是在到达下一个地点时便宜买来或免费得到的，这些盒子都能再次得到回收利用。
They can be popped in a recycling bin when you arrive and bought cheaply or had for free when you get to the other end.
使用一个真实类比，当您乘飞机旅行时，要签入托运大件行李且只要在到达中转点或目的地时才领取它们。
Using a real life analogy, when you travel by air, you check-in large pieces of luggage and only claim them when you reach a transfer point or your destination.
应用推荐