v.使高兴；活跃；振奋起来
Put on some music to liven things up. 放些音乐，让气氛愉快起来。
The meeting began to liven up after he spoke. 在他发言之后会议开始活跃起来。
v.活跃；有生气；快活
n.生动(活跃度；混响度)
