动植物检疫机关检疫人员依法执行公务，任何单位和个人不得阻挠。
No unit or individual may obstruct a quarantine functionary of an animal and plant quarantine organ from carrying out his or her duties according to law.
这些人造的基因单位通过连接病毒、细菌、植物与动物的基因片段创造。
The artificial gene units are created by joining fragments of DNA from viruses, bacteria, plants and animals.
如果把它们归类成较大的单位，那么就可以确知某种未知植物属于何类群。
If they are grouped into larger units one can ascertain what group an unknown plant belongs to.
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