The same problem is with organ transplantation is that the recipient has to be matched to the donor and so that's a problem.

和器官移植中的问题一样,受体需要与供体匹配,这就是问题所在

耶鲁公开课 - 生物医学工程探索课程节选

That's a big problem and so can you protect these cells that you give to the recipient from attack by the recipient's immune system?

并且至关重要,那么你们想办法保护这些植入受体的细胞,使它们免受免疫系统的排异反应么

耶鲁公开课 - 生物医学工程探索课程节选

We don't know the intended recipient of this letter, and we actually have no idea whether Milton actually sent the letter; but a couple of drafts of this letter actually exist in Milton's own hand, and the letter is clearly a document that Milton had devoted some energy and some time to. We need to look at it.

我们不知道收件人是谁，我们也不清楚弥尔顿到底有没有寄这封信;,但这份信的草稿确实在弥尔顿那里，弥尔顿显然对这封信投入了不少,时间和精力，我们来看看。

耶鲁公开课 - 弥尔顿课程节选