Because we've learned about that biology we've been able to make erythropoietin outside the body and use it as a drug.
由于我们已经知道了这种生物学机制,因此我们能体外制造促红细胞生成素,并作为药品应用
Now, you know, because we talked about cell culture already, that a great--that we talked about last week, manufacturing of cells.
你知道,因为我们已经讲过细胞培养,我们上周讲过的,细胞的大规模制造
If we build an engine for a car or anything else, it almost always is going to have some key element that's operating in a cycle, otherwise it won't keep going, right.
如果我们为一辆汽车,或其他什么东西制造一台引擎,它总要有一些关键,要素来形成循环。
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