英文演講前想來個短笑話緩解壹下氣氛，請問用什麽好呢？

What's the difference between water and ink?!

ans;A drop of ink will tinge a glass of water ,but a glass of water cant tinge a drop of ink.

意思大概就是妳問壹下水和墨水的分別.那就是壹滴墨水能汙染整杯清水但是壹杯清水不能凈化壹滴墨水..這應該也能比喻環境吧..