a teeming brain的用法和样例：
- Here is not merely a nation but a teeming nation of nations.
- Prosperity has arrived in a blur to a teeming city that still reflects images of its cultural traditions.
- That maths exam I took was a regular brain drain.
- A teeming, diseased sea of swarming flesh, slaves rushing to do meaningless work to feed their (our) ruinous addictions.