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。
No, Mrs Brown. Your son's trouble is very common these days. It happens all the time. It comes and goes very quickly. He'll get well soon.
是的,布朗太太。你儿子的毛病现在是极常见的,经常有的。它来得快,去得也快。他不久就会好的。