她走的时候，听到狐狸自鸣得意的笑声。
As she left she heard him laughing to himself at his own cleverness.
失败的那些人不喜欢听到我们得意的笑声。
“牢不可破的誓言？”斯内普脸上的表情变得不可捉摸了，贝拉特里克斯发出一串得意的笑声。
Snape's expression was blank, unreadable. Bellatrix, however, let out a cackle of triumphant laughter.
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