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。
The tragic sinking of this great liner will always be remembered, for she went down on her first voyage with heavy loss of life.
然而,这艘巨轮首航就下沉,造成大批人员死亡。人们将永远记着这艘巨轮的沉没惨剧。