n.节拍；跳动
名词beat的复数形式.
The band emphasized the beats in the music to show that it was a marching tune. 乐队强调这支乐曲的节拍，以显示它是进行曲。
A whale's heart beats nine times a minute. 鲸的心脏每分钟只跳动次。
The pulse of joy that beats in us at twenty becomes sluggish. 二十岁时在我们身上跳动着的欢乐的脉搏会迟缓下来。
