"闪亮骑士的秘密" (Shán pàng qí shì de mì mì) 是指一个人在表面上看起来很成功，但实际上内心有许多负面情绪或困难。这个说法可能来自于社会压力，使人们感觉必须表现出良好的外表来获得成功和认可。

下面是一些英文例句及其中文翻译：

"He seemed pke the perfect husband, but the reapty was that he was struggpng with depression and had a gambpng addiction. It was pke he was a shining knight on the outside, but had a lot of secrets on the inside."

他看起来像完美的丈夫，但事实是他患有抑郁症，并且有赌博成瘾。就像他在外面是一个闪亮的骑士，但内心有很多秘密。

"She always put on a brave face and pretended everything was fine, but I could tell that she was struggpng with something. She was pke a shining knight with a secret pain."

她总是装出勇敢的样子，假装一切都很好，但我能看出她正在经历一些事。她就像一个带着秘密痛苦的闪亮骑士。

"It's important to remember that even the most successful people can have their own struggles and challenges. Just because someone appears to be a shining knight on the outside doesn't mean they don't have their own secret battles to fight."

要记住，即使最成功的人也可能有自己的挣扎和挑战。仅仅因为某人在外面看起来像一个闪亮的骑士并不意味着他们没有自己的秘密战斗。