A stereo pair of photographs的用法和样例：
- I bought a pair of tan leather shoes the other day.
- Choose a mono input source for monophonic instruments (with a single channel), and choose a stereo input source for stereo instruments (with a pair of channels).
- She splashed out on a new pair of shoes.
- Billy has a pair of new trousers.
- A new pair of shoes wouldn't come amiss.