求英语帝on average,they spent four-fifth of their leisure time on dancing对吗

求英语帝on average,they spent four-fifth of their leisure time on dancing对吗 on average与average的区别 英语average是什么意思? on average、on the average和on an average有何区别 最好举几个例子 求几个经济学的名词解释,要用英语maximum priceminimun pricelong average cost最后一个是long run average cost 英语问题 （平均,一般说来）除了能用 on average,还可以用 用in terms of,on the other hand,on average各造一个英语句子英语短语造句子 in an average 和 on average的区别 average 词组英语词组 多点 average average average average AVERAGE On the average中的the能否省略? on an average和on the average在用法上的区别 求翻译!英语帝come on! 求英语帝翻译!they crept in under the back door of the big house .they were very hungry ,so the town mouse took his cousin to the dining room .there was a lot of rich food on the tabie.