The future of food security lies beneath the waves, if we're wise enough to cultivate it properly.

The question is not whether the thing exists， but whether it has any essence which is capable of existence without us.

你怀疑别人，别人也就会怀疑你，你提防别人，别人也就是提防你，

学习之道，没有什么比能够弄清事物的始末，来龙去脉更重要的。