Let us emulate Mother Teresa in giving up the earthshaking undertakings; let us assume the attitude of "like a willing ox with head bowed", and let us start the servicebit by bit!
And Internet service providers pay for the bit in between - the connection.
而网络服务提供商相互之间还要支付费用——连接费。
3
If the service changes a bit it doesn't take much to change the client code to match, and if you're really clever, your client code can be so dynamic that it doesn't have to change at all.