可是它仅仅在晶胚中才具有活性。

But it is active only in embryos.

youdao

测试表明，这种催化剂若没有被碳消耗则7小时后仍具有活性。

Tests showed that the catalyst remains active for seven hours before it becomes choked up with solid carbon.

youdao

这使得高铁酸盐极其具有活性，而这也是Daly先生希望挖掘出的活性。

That makes ferrates extremely reactive, and it is this reactivity which Mr Daly hopes to exploit.

youdao

There are still some active smallpox virus specimens kept in the world, and there are two sources of small--two places where smallpox is stored now.

世界上仍有地方保存着,一些具有活性的天花病毒样本,有两个地方还储存着天花病毒样本

耶鲁公开课 - 生物医学工程探索课程节选

If cells were actively proliferating, that is you had a population of cells that are actively proliferating, they would be going through continuous rounds of the cell cycle.

如果细胞处在活跃增殖状态,就是说有一定数量的,细胞具有增殖活性,它们就会连续地经历细胞周期的各个阶段

耶鲁公开课 - 生物医学工程探索课程节选