1、rate的中文意思是：速度；进度。
2、例句：
Most people walk at an average rate of 5 kilometres an hour.大多数人步行的平均速度为每小时5公里。
The number of reported crimes is increasing at an alarming rate.报警案件的数量正在以惊人的速度增长。
Figures published today show another fall in the rate of inflation.今天公布的数字表明通货膨胀率又一次下降。