For comparison, versions of about 300 human olfactory receptor pseudogenes are still functional genes in the genomes of rats and mice.
大约有300个人类嗅觉受体的伪基因,其相应基因在大鼠和小鼠的基因组内,仍是具有功能的基因。
Each functional area has within it a number of systems and subsystems.
在每一种职能范围内,包含有一定数量的系统和子系统。
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