图1：在每个迭代的开始，敏捷团队会与客户商谈来确定新的特性或变更请求。
Figure 1: at the start of each iteration, agile teams negotiate with the customer to define new features or change requests.
我们先会确定制造一款新软件，然后进行编程，然后进行测试，然后对第一批客户进行发布。
We would specify a new piece of software, then program it, then test it then launch it for the first customers.
总体思想十分简单：使用客户机cookie(如果可用的话)确定被缓存的数据，如果自上一次轮询事件以后没有产生新的数据，则发送一个304状态。
The general idea is simple: Use a client cookie (if available) to identify the cached data, and send a 304 status if no new data has arisen since the last polling event.
应用推荐