这种代替本来是传播疾病的自然物种的想法似乎是个离谱的要求。

These would somehow have to replace the natural, disease-bearing mosquitoes, which is a tall order.

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人类依靠技术途径与仪器工具系统的支持，超越了自然物种的限制。

Relying on technological approaches and instrumental systems, humankind transcends the natural limits.

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但是科学家们考虑用崭新的基因方法生产合成蛋白质，用以替代消失的自然物种。

But scientists think synthetic proteins produced by the new genes replaced the missing natural versions.

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And in fact, Skinner explicitly made the analogy from the natural selection of species to the natural selection of behavior.

实际上，斯金纳也确实明确地,对物种的自然选择,同行为的自然选择进行过类比。

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