（二）采取预收款方式提供建筑服务；
Apple Watch 走的也是这条路——将健康与通知两个功能一边升级、一边剥离出来，用户需要购买额外的配件，才能解锁 iPhone 更全面的体验。
，详情可参考同城约会
"This would have been a very decorative brooch. I think it's a very special find for the site."
Graves are clustered around the possible building, which is highlighted in pink