num.第八十四
Time is sometimes called the fourth dimension. 时间有时被称为第四度空间。
He toiled on till he was past eighty. 他一直辛苦工作直到年过八十。
There are eighty pages in this book. 这本书有八十页。
I am a soldier of the fourth cavalry. 我是第四骑兵部队的一员。
Reserve double room June fourth to tenth inclusive. 预订双人房间,六月四日至十日,共六晚,望订妥复电。
Mars is the fourth planet in order from the sun. 火星是太阳系的第四颗行星。