a situation in which prices, business activity, etc. tend to increase or stay at a high level, usually showing financial success 看涨的；保持高价的；繁荣的 the buoyancy of the market 市场的活跃
the feeling of being cheerful and feeling sure that things will be successful 愉快而充满信心的；乐观的 a mood of buoyancy 轻松愉快的心情
the fact of floating, being able to float or able to keep things floating 漂浮的；能够漂起的；有浮力的 a buoyancy aid (= something to help you float) 助浮物