与其他通过伤疤进行愈合的典型哺乳动物不同，这些老鼠则通过形成一种胚基以帮助细胞快速生长。
Unlike typical mammals, which heal wounds by forming a scar, these mice begin by forming a blastema, a structure associated with rapid cell growth.
多数是在鸡胚中生产的灭活病毒疫苗，一些是在细胞培养基中生产的灭活疫苗，还有几个减活病毒疫苗。
Most will be inactivated virus vaccines made in eggs, some will be killed virus vaccines made in cell cultures and a few will be live attenuated virus vaccines.
结果表明，体外培养人胚肺二倍体成纤维细胞成活至52代，而含0。2%黄芪制取液的培养基使细胞成活至77代。
The results showed that heldf cultured in vitro lived up to52generations while the culture medium containing0.2% amb extract made the cells live up to77genera-tions.
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