What happens is you become sensitive to a cue that an event is about to happen and that allows you to prepare for the event.

经典条件作用使得你对预示着,即将发生之事的提示线索变得敏感,这使得你能够为即将发生的事件作好准备。

耶鲁公开课 - 心理学导论课程节选

It predicts that the best timing is when the conditioned stimulus, which is the signal, comes before the unconditioned stimulus, which is what you have to prepare for.

它预测，最佳的时机,莫过于作为信号的条件刺激，出现在需要你做准备的，非条件刺激之前。

耶鲁公开课 - 心理学导论课程节选

So, in terms of what it is that you need to prepare and bring with you for the exam, you need to bring your MIT ID, especially if you haven't been showing up regularly to your recitations and you aren't 100% sure if your TA knows exactly who you are, you need to make sure you have your MIT ID with you.

那么，关于你需要做哪些准备,考试可以带哪些东西，你需要带着你的学生证，尤其是如果你没有经常地参加,习题课,你不能百分之百保证,你的助教确实认识你，那么你更得确保自己到时带着学生证。

麻省理工公开课 - 化学原理课程节选

A team of surgeons is working to harvest an organ at one site while another team of surgeons is working to prepare the recipient at another site, and the organ is flown there.

一组外科医生,将器官从供体取出的同时,另一组医生在另一个地方,为移植手术做准备,等待器官空运过去

耶鲁公开课 - 生物医学工程探索课程节选