兵不完利,与无操者同实
解释:兵器既不齐全又不锋利,实质上和没有兵器一样!
We must design products with their end-of-life in mind from the very beginning.
I never guess. It is a capital mistake to theorize before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts.