哺乳动物中的红细胞成熟时是无核的，这意味着它们缺乏细胞核。
Erythrocytes in mammals are anucleate when mature, meaning that they lack a cell nucleus.
无核细胞是通过药物、细胞松驰素b把细胞核去掉制备的。
Enucleated cells are prepared by removing cell nuclei in the presence of the drug, cytochalasin b.
本试验证明了TMV - RNA在有细胞核的烟草原生质体中能大量增殖，但在无核的胞质体中却难以增殖。
The experiment has proved that TMV-RNA multiplied vigorously in tobacco protoplasts with cellular nucleuses, while hardly multiplied in cytoplasts separated from nucleuses.
其他的脊椎动物，比如说鱼类，爬行动物和鸟类等红细胞有核的动物的红细胞却没有进化成无核的红细胞。
Other vertebrates such as fish, reptiles and birds have red cells that contain nuclei that are inactive.
其他的脊椎动物，比如说鱼类，爬行动物和鸟类等红细胞有核的动物的红细胞却没有进化成无核的红细胞。
Other vertebrates such as fish, reptiles and birds have red cells that contain nuclei that are inactive.
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