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。 In 1951, The British Board of Film Censors launched the X certificate to indicate a film was "particularly graphic." While this initially referred to violence and bad language as well as sex, "X-rated" was co-opted via the porn industry and it is now shorthand for sexually https://coingenius.news/defi-is-viewed-as-disintermediated-not-decentralized-by-the-french-regulator/