If you can't explain your chemistry to a non-scientist, you don't understand it well enough.
如果你无法向非科学家解释你的化学研究，说明你理解得还不够深入。
我不害怕风暴，因为我正在学习如何驾驶我的船。
Language is not just a system of symbols， but a set of practices with social and cultural significance.
解释：要想人爱护自己，必须先爱护别人；要想人顺从自己，必须先顺从别人。