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 point a movie was "really graphic." However this at first referred to violence and negative language as well as intercourse, "X-rated" was co-opted from the porn industry which is now shorthand for sexually specific substance. https://coingenius.news/doge-crashes-down-at-0-0886-as-a-bearish-rule-of-the-market-cryptopolitan/