Nucleotide sequences homologous to oncornaviruses dna products have been observed in human leukaemic cells . 在人白血病细胞中，已经观察到与肿瘤毒病DNA产物相同的核苷酸序列。
2.
Nucleotide sequences homologous to oncornaviruses dna products have been observed in human leukaemic cells 在人白血病细胞中，已经观察到与肿瘤毒病dna产物相同的核苷酸序列。
3.
The reverse transcriptase isolated from human leukaemic cells resembles that from rna tumour viruses in several respects 从人白血病细胞分离得到的递向转录酶在如下几方面类似于rna肿瘤病毒逆向转录酶。
