A

[英]

解释:

a.（非特指的）一（个）；（用于表示时间、速度、价格等意义的）每一

例句:

There was a terrible sadness in her eyes.

她眼神中流露出深深的悲伤。
He did have a real knowledge of the country.
他对该国的确知之甚多。