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。
Once on the boat, they were taken bolow and their chains were fixed to two bars that ran the length of the ship.
一上船,他们就被带进底舱,他们的镣铐就被拴在两根从船的一头伸到另一头的铁杆上。