at the rate:以......速度。 速度;速率: The rate at which something happens is the speed with which it happens. The rate at which hair grows can be agonisingly slow. 头发生长的速度可能极其缓慢。 比率;频率 : The rate at which something happens is the number of times it happens over a period of time. New diet books appear at a rate of nearly one a week. 新的饮食类书籍差不多一周出一本。