These materials were transmitted and developed by different circles within Israelite society over centuries, and they crystallized at different times.

这些资料被传播发展,几世纪来，由以色列社会中的不同圈子，它们曾在不同的时期都非常明确。

耶鲁公开课 - 旧约导论课程节选

We'll think about it in section, how you don't need to vaccinate everybody, but you just need to vaccinate a critical number in order to stop the disease from progressing through a community.

我们在讨论会上讲这个,为什么不需要给每个人都接种,但你只需要让接种人数达到一个临界值,就能阻止这个疾病在社会中传播

耶鲁公开课 - 生物医学工程探索课程节选