A common design looks like a high tunnel.Unlike a greenhouse, which uses a heating system, a hoop house is heated by the warmth of the sun.

VOA: special.2009.12.22

Now what is the thing we learned in high school about how to design these experiments?

那么我们在高中关于,怎么设计实验学了些什么呢？

麻省理工公开课 - 计算机科学及编程导论课程节选

Now what is the thing we learned in high school about how to design these experiments?

那么我们在高中关于,怎么设计实验学了些什么呢？

麻省理工公开课 - 计算机科学及编程导论课程节选