It was a beginning, but it didn't take because they had technical problems.

但是当时政策成型后并没有执行,因为那时存在技术上的一些问题。

耶鲁公开课 - 金融市场课程节选

So there's some issues about how these technologies might be applied, right?

在这些技术的实际应用中,确实存在着一些问题,对吧

耶鲁公开课 - 生物医学工程探索课程节选

Problems like the artificial heart are still unsolved, there's still room for innovation, still room to learn from what hasn't worked before, to learn from science, and to design something better.

人工心脏技术中存在的问题还没有解决,还有创新发展的空间,仍有从未涉足的领域来研究,通过对科学原理的学以致用,去设计出更好的产品

耶鲁公开课 - 生物医学工程探索课程节选