darwin believed that the theory of evolution the foundation is the day competes the thing to select物竞天择 natural selection 例句:The pressure of natural selection is An irresistible force shaping all of nature. 物竞天择的法则是一种不可抗拒的造就自然界的力量,永无止境例句:And forever has no end. 永永远远,永无止境.The thing competes it is selected , endless