on an/the averagein most cases; usually 通常 * On an average Don's mother has to ask him three times before he helps wash dishes. 通常唐的母亲叫他3遍他才帮助洗盘子。 * On the average the machine turns out one bottle every two seconds. 这台机器平均每两秒钟生产1只瓶子。on an/the average平均而言;按照平均标准:On an average,a man can walk about five kilometers or run ten kilometers an hour.平均而言,一个人每小时能走大约五千米,或是跑十千米。 |