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Recombination between herpesviruses has been seen in vitro and in vivo under experimental conditions .

已经在实验条件下的试管和活体中，观察到了疱疹病毒之间的重组。

We start with these fragments , and then we have a homologous recombination system that reassembles those into a chromosome .

我们以这些片段开始，然后通过同源重组将其组合到染色体中。

By the end of this so-called recombination era , the universe consists of about 75 % hydrogen and 25 % helium .

这段时间又称重组时期，宇宙大约由百分之七十五的氢原子和百分之二十五的氦原子组成。

Working with a team at the chinese sequencing powerhouse bgi , auton sequenced nearly 200 sperm cells and was able to estimate the recombination rate for the man who had donated them .

在中国华大基因测序中心工作期间，奥托对将近200个精子进行了测序并对提供精子细胞的人的重组率进行了估计。

Only well-characterized live vaccines , rendered harmless by mutations in the same or overlapping regions , should be used in order to minimize the risk of recombination to a new virulent strain , he argues .

他主张，为了把重组新强毒株的风险降到最低，应该只使用优质的活疫苗，以使在相同的或毗邻的地区所产生的突变无害。