virus, 病毒, nucleic acid, 核酸, 包膜, envelope, 蛋白质外壳, protein coat, replication, 复制, 种群, population, emigration, 迁出, symbiosis, 共生, 群落, community, 迁入, immigration, 物种, species, 真菌, fungi, 细菌, bacteria, cytoplasm, 细胞质.

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