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。
It is true that during their explorations they often faced difficulties and dangers of the most perilous nature, equipped in a manner with would make a modern climber shudder at the thought,
確實,在探險中他們經(jīng)常遇到驚心動魄的困難和危險,而他們裝備之簡陋足以使現(xiàn)代登山者一想起來就膽戰(zhàn)心驚。