To answer the first part of your question, I'd like to say that our studies were very extensive.
你問題的第一部分,我要說的就是我們的研究非常廣泛。
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”,他說,“不是飛機,也不是自行車,我想可以把它叫飛車”。