able or tending to keep afloat or rise to the top of a liquid or gas
能浮起的。
(of a liquid or gas)able to keep something afloat
(液体或气体)有浮力的。
〈喻〉 (经济、生意或市场)有活力的;繁荣的
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car sales were buoyant. 汽车销售如火如荼。
 
〈喻〉 轻松愉快的;乐观的
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the conference ended with the party in a buoyant mood .会议结束时该党气氛欢快。
 
"late 16th cent.: from French