灭绝生存英语怎么说

"Extinction survival" 英文说法是 "survival of the fittest", 意思是生物在竞争、适应环境的过程中，适者生存，不适者灭绝。这个说法最早是由英国生物学家赫胥黎在其著作《物竞天择》（"On the Origin of Species"）中提出。
例句：
"Survival of the fittest is a principle that has been proven time and time again in the natural world."
(“物竞天择是一个在自然界中一次又一次被证明的原则。”)
"The extinction of dinosaurs was a result of the survival of the fittest among species."
(“恐龙灭绝是物种间物竞天择的结果。”)
"In the business world, it's not always the biggest companies that survive, it's the ones that are the fittest for the market."
(“在商业世界中，并非总是最大的公司能够生存，而是那些最适合市场的公司。”)