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关于冠状病毒
基因组序列发布
基因组变异
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国家生物信息中心Mega：Tree scale 0.0001，represents the number of differences between sequences (e.g. 0.1 means 10 % differences between two sequences)
BEAST：Tree scale 0.05, represents days before the time of lastly sampled genomes by scale*365
NGDC