Chemical modification and genetic modification also can be used to and generate the catalytic antibodies.

其中化学修饰和基因修饰都可用来产生催化抗体.

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But it appears that, to date, traditional plant breeding boosts crop yields better than genetic modification.

但是到目前为止, 似乎传统的植物培育技术比转基因技术更能提高农作物产量.

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