但考虑到人类系在世界生态系统中演化而成，我们所做的每一件事 — — 杀绝物种、毁灭森林、污染大气 — — 都可以视为演化过程的自然产物。
But, given that humans evolved within the world’s biological system, everything we do – killing off species, razing forests, polluting the atmosphere – can be regarded as a natural product of the evolutionary process.