from fair to middling的用法和样例：
- He deals fair and square as folks go.
- With the money he earned, he just managed to rub along.
- His knowledge of English is fair.
- Druzhinas are a left-over from Viking times, and their ancestry is evident in the wicked axes they carry.
- It is simple to construct in moderate sizes.
- Taxis cruised about, hoping to pick up late fares.