非常感谢您的耐心阅读，请在下方提供您对本篇帮助的反馈，以便我们持续改进本文。 In 1951, the British Board of Movie Censors introduced the X certificate to indicate a film was "really graphic." Though this at first referred to violence and undesirable language together with sex, "X-rated" was co-opted by the porn industry and is also now shorthand for sexually explicit content. https://coingenius.news/a-deeper-look-at-classiqs-new-survey-on-quantum-computing-awareness/