num.第二十八
August is the eighth month in a year. 八月是一年中的第八个月。
It take twenty minutes for us to go there by bike. 我们骑自行车到那里要花20分钟。
He looks to be a young man of twenty. 他看起来就像一个20岁的青年。
He has been in practice for twenty years. 他已有20年的实践经验。
He was the eighth to break the record. 他是打破该记录的第八人。
