本日单字：臭DD
解释：
https://i.imgur.com/3S8hVra.jpg
实际案例运用：
https://i.imgur.com/OxnA1Nd.jpg
https://i.imgur.com/jGsSvzp.jpg
https://i.imgur.com/eWZEjOC.jpg
https://i.imgur.com/LpPvvfa.jpg
https://i.imgur.com/8oKEKuM.jpg
https://i.imgur.com/qH7d7k4.jpg
还有几百张
但考虑篇幅就先这样