There are no hard distinctions between what is real and what is unreal, nor between what is true and what is false. A thing is not necessarily either true or false; it can be both true and false.
The truth is often found in the margins.
解释：药物之间有阴阳、子母、兄弟等配对关系，说明药物配伍的原理。
Success in furniture manufacturing comes from understanding both craftsmanship and the customer’s needs.