the quality of feeling energetic, or the behaviour of someone who feels this way

He maintained a youthful exuberance. 他保持着青春活力。

One thing that stands out is her exuberance and zest for life. （她身上）最为突出的一点就是她的充沛精力和对生活满满的热忱。

the fact that plants are strong and growing quickly

They marvelled at the exuberance of the rainforest. 他们惊叹于雨林的繁茂。

The flowering plant beds change from neatness to riotous multi-coloured exuberance. 花坛从起初的整整齐齐发展成五彩缤纷的盛况。