求翻译：“是哦，”风清逸温柔地笑着，语气却冷得让人心寒，“卧底通常都是一副无辜的样子，我居然忘了。”是什么意思？

"Is well," wind Seiitsu smiled sweetly, tone is too cold to chilling, "undercover is usually a pair of innocent looks, I forgot. ”