- 独自: by oneself; all alone
- 暗笑: laugh in one's sleeve; snigg ...
- 独自暗中地笑: chuckle to oneself
- 窃喜，独自暗中地笑: chuckle to oneself
- 暗笑: laugh in [up] one's sleeve; snigger; snicker; laugh in one's heart; laugh behind another's back 虽然他假装同情, 但他却在暗笑。 although he pretended to sympathize, he was laughing in his sleeve
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