求翻译：DNA甲基化是动植物发育和肿瘤发生的主要力量，它提供了一种阻止动物和植物中外源DNA表达的防御机制，而一耽误导，将导致肿瘤发生。是什么意思？

dna methylation is the main force of the animal and plant development and tumorigenesis, it provides a way to stop the expression of defense mechanisms of animals and plants of exogenous dna, while a delay to the guide, will lead to tumorigenesis.

Flora and fauna is DNA methylation and tumor growth in the main force, and it provides a block plants and animals of the Chinese and foreign source DNA expression, and a defense mechanism, and will result in delays tumor.

The DNA methylation is the main strength which the zoology and botany growth and the tumor occurs, it has provided in one kind of impediment animal and the plant the extraneous source DNA expression defense mechanism, as soon as but delays misleading, will cause the tumor occurrence.

DNA methylation is a major force for animal and plant development and tumorigenesis, which provides a way to prevent the expression of Heterologous DNA in animal and plant defense mechanisms, and a delay will cause tumors.

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