a passing acquaintance的用法和样例：
- Red Hat Linux was chosen because of its popularity, and because most administrators users have at least a passing acquaintance with its system layout and conventions.
因为Red Hat Linux很受欢迎并且大多数管理员用户至少熟悉它的系统布局和一些约定,所以我们选择它。
- His interest in photography is only a passing fad.
- A passing car splashed mud on my new trousers.
- A passing truck banged up the mailbox.
- They had a passing interest in music.
- A passing car splashed her newly-bought dress.