长期以来，人们一直认为衰老是一个自然发生的过程，是不可抗拒的自然规律，抗衰老违背自然的法则的。
For long time, the people have been think that decrepitude is a process of abiogenesis, is the natural regulation that can't resist, the anti-decrepitude is to disobey the physical law.
有一些变暖是自然发生的。随着上一个冰河时代的结束和冰的融化，我们已经经历了长达20，000年的变暖过程。
Part of the warming is natural; we have experienced a 20,000-year-long warming as the last ice age ended and the ice melted away.
今年下半年，他们将建设一个更先进的厂房，垃圾埋入几天后，就会腐烂，产生甲烷，而不是躺在地下好几年等着这个过程自然发生。
Later this year, it will build an advanced facility in which trash will enter decay and produce methane in days, instead of lying underground for years to wait for the process to happen naturally.
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