n.浮力;(物体在液体里的)浮性;(从失望、噩耗等中)恢复正常的能力;(价格、营业状况等的)维持力;
例句:
I admired his buoyancy and persistent good humor.
我很欣赏他轻松快乐的样子以及一贯的幽默作风.
To move with lightness and buoyancy.
轻快活泼地移动.
Then she had been pale and sad but there had been a buoyancy about her.
那时她尽管面黄瘦,但还显和比较轻松活泼.