（二）业务之间具有明显的主附关系。主要业务居于主体地位，体现交易的实质和目的；附属业务是主要业务的必要补充，并以主要业务的发生为前提。
A spam-blocking feature that saves disk space and makes your site run faster.
，更多细节参见旺商聊官方下载
Sync/async separation，这一点在夫子中也有详细论述
This week, Anthropic softened its safety policy — often viewed as one of the strongest in Silicon Valley — citing competitors' reluctance to do the same and the federal government’s disinterest in prioritizing security.