?克瓦斯
... 克莫拉 camorra 克瓦斯 kvas 夸克 quark ...
?格瓦斯
格瓦斯（Kvas）是小贝同学的啤酒。
俄?斯城
He denies the allegation, and said that he often visited London and visited Mr. Litvinenko to promote his side business exporting kvas a traditional Russian beverage made from fermented rye.
WSJ: Russia Declares Litvinenko Murder Suspect a Victim
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