n.第五十一；五十一分之一

adj.第五十一的

Although he's nearly fifty, he can still play tennis with the best. 盡管他已年近五十，可是他網球還是打得不比別人差。

He does not look fifty by any manner of means. 他看上去一點不像50歲的人。

There are more than fifty workers in this workshop. 這個車間里有五十多個工人。

Some fifty shares lie on his hands. 他還有50來股沒脫手。

Fifty years has passed away since they met. 自從他們見面，50年過去了。

The house stands fifty yards from the road. 這房子離馬路有50碼遠。