Practice relates to a on a regular basis adopted treatment or sample in conducting things to do: It is his observe to validate all statements. 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 : prolonged-founded observe considered as unwritten law c : recurring exercise Custom will make all items quick. 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... https://franko445ukn7.loginblogin.com/profile