It is true during their explorations they often faced difficulties and dangers of the most perilous nature.
确实在探险中，他们经常面临着各种最有危险性自然界的艰难和险阻。
It is true that during our explorations we often faced difficulties and dangers of the most perilous nature.
确实，我们在探险的过程中，常常遇到最惊心动魄的困难和危险。
It is true during their explorations they often faced difficulties and dangers of the most perilous nature,...
的确，在探险中，他们经常面临着各种最有冒险性的艰难和险阻。
It is true that during their explorations they often faced difficulties and dangers of the most perilous nature.
确实，他们在探险中遇到了极具威胁性的困难和危险。
It is true that during their explorations they often faced difficulties and dangers of the most perilous nature.
确实，他们在探险中遇到了极具威胁性的困难和危险。
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