知乎，让每一次点击都充满意义 —�?欢迎来到知乎，发现问题背后的世界。 知乎，让每一次点击都充满意义 —�?欢迎来到知乎，发现问题背后的世界。 b : extensive-founded exercise considered as unwritten regulation c : recurring follow Custom will make all issues effortless. establishment - a custom that for years has actually been an important characteristic of some group or Culture; "the instituti... https://adami470mzo9.wikipowell.com/user