natural（自然的）本身是形容词形式。是nature（自然）的形容词形式，复数： naturals
How far is human nature determined by biology?
人性在多大程度上是由其生理因素决定的？
My work is very specialized in nature.
我的工作特点是非常专业化。
She was the natural choice for the job.
做那份工作，她是当然人选。
The body has natural defence mechanisms to protect it from disease.
人体对疾病具有先天性防御机制。
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