Now, as obvious a statement as that is in this algorithm, it turns out that is the key to this whole problem being solved correctly without my algorithm looping infinitely.

这是此算法中很明显的一句话，也是正确解决,整个问题的关键,否则此算法就会陷入死循环。

哈佛公开课 - 计算机科学课程节选

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。

麻省理工公开课 - 热力学与动力学课程节选

So, making gene therapy specific is a key problem in making it work.

所以基因治疗中,特异性对能否成功就至关重要了

耶鲁公开课 - 生物医学工程探索课程节选

Smoking is a key example, it took America decades to mobilize after the catastrophic consequences smoking were clear, but when it did, American tobacco companies exploited overseas markets, particularly in the developing world.

吸烟就是一个重要的例子,美国人在吸烟的灾难性后果,已经明确的几十年之后,才采取行动,但在行动时,美国烟草公司已经开拓了海外疆土,尤其在发展中国家

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选