A Harvard anthropologist has proposed that using fire to cook food could be dated back to almost two million years and that it could explain hominid features like having a large brain and small teeth.
This provides the flexibility to change service providers who implement the service interface without having to make large changes in the code of your it systems.
这就提供了改变实现服务接口的服务提供者的灵活性，同时又不必对IT系统的代码做大的改变。
3
Having a large capacity for energy is good, but just like time, it is an easy thing to waste.