I have called this principle, by which each slight variation, if useful, is preserved, by the term Natural Selection.  

任何行业长久发展的关键在于适应变化的能力。

智能化改造要结合实际，不能盲目跟风。

Profitability and sustainability must go hand in hand—there is no other way forward.

心理过程是掌控环境的工具。