teachers and teachers

名词重复出现有时是为了区分不同的类型，尤其是区分好与坏。

1. There are teachers and teachers. $\approx$ There are good and bad teachers. 教师是各种各样的，有好也有坏。

2. You can find doctors and doctors. $\approx$ You can find good and bad doctors. 你能找到各式各样的医生, 有好的, 也有坏的。

(参见 and $^{23}$ )