这类场景也很能体现 Expert 的定位，它尝试把一整段专业工作流程产品化，从增强单次问答的模式里彻底跳了出来。
Border Points: Each cluster has a limited number of defined "border points" – these are the gateways in and out of the cluster.
，更多细节参见safew官方下载
Why the FT?See why over a million readers pay to read the Financial Times.，这一点在同城约会中也有详细论述
$39.99 $19.99 at Target，详情可参考91视频