It was a self-service lunch, so we could take as much food as we wanted. 这是自助午餐，我们可以想吃多少就吃多少。
The boat is approaching the jetty at a high speed. 这艘船正以很快的速度靠近岸边。
This Walkman uses a cassette tape to play music. 这款随声听需要一盘磁带和一副耳机。
DET. （指初次提及或非特指的人或物）一（个）. You use a or an when you are referring to someone or something for the first time or when people may not know which particular person or thing you are talking about. ※Riches serve a wise man but command a fool. 财富事智者，却又驭蠢人。 ※He commands enough that obeys a wise man. 听从智者意见的人无需多问别人.
※Fame like a river is narrowest at its source and broadest afar off. 名誉像条河，源头最狭窄，远处最宽阔。 ※Fame like a river is narroest at its source and broadest afar off. 名誉象条河,源头最狭窄,愈流愈宽阔.
