In other cases, the virus propagates in such high numbers that release is literally an explosion of the cell.

在另一些时候,病毒的数量相当大,那么释放病毒就会使细胞的爆裂

耶鲁公开课 - 生物医学工程探索课程节选

Agricultural villages will have existed all over the place in the late Stone Age, in the Neolithic Period, as it is known. But there is a difference and the critical difference is that a city contains a number of people who do not provide for their own support.

农业村庄在石器时代后期,以及新石器时代随处可见,但二者是有区别的,最重要的区别在于,城市能容纳,相当数量,无需自给自足的人口

耶鲁公开课 - 古希腊历史简介课程节选