Why did it take so long to realize that released prisoners were involved in the planning of this?

VOA: standard.2010.03.24

And so it didn't take long, once this vaccine were--was available, for people to want to get organized and think about ways of delivering this vaccine to all the regions of the world where people were potentially infected.

这并不会花费很多时间,一旦疫苗生产完毕,一些人就会组织起来,并想办法把将这些疫苗送往,世界上一些地方,那些地方的人很有可能感染疾病

耶鲁公开课 - 生物医学工程探索课程节选

Here is the pitch in--of--a string an octave higher so you can see it this way. As you probably know, if you take a long string and pluck it, it's going to take that long string a long time to pass that sort of cycle, if you will, just one pass through that cycle.

这也是个音高,一个高八度的音弦,你可以这样这样看 你们可能知道,如果你拨动长弦,长弦要经过很长时间,才能完成一个震动周期,如果你想,可以尝试下

耶鲁公开课 - 聆听音乐课程节选

The period, that's right. So, it's going to take one period to move that long. And another way 1 we can say period is just 1 over nu or 1 over the frequency So, now we know both the distance traveled and the time the elapsed.

还是？周期，对的,它需要一个周期的时间,另一种说法是周期是,除以nu，也就是1除以频率,现在我们同时知道了。

麻省理工公开课 - 化学原理课程节选