To answer the first part of your question, I'd like to say that our studies were very extensive.
你问题的第一部分,我要说的就是我们的研究非常广泛。
I don't know, he says. It isn't a plane, and it isn't a bike. I think we can say it's a plike.
“我不知道”,他说,“不是飞机,也不是自行车,我想可以把它叫飞车”。