险恶的本性

perilous journey───危险的旅程

by its nature───其性质

curious mixture───奇怪的混合物

from nature───从大自然

gentle nature───性情温和

glorious future───辉煌的未来；锦绣前程

ill nature───n.心地不良；恶意；坏脾气；性情乖僻

perilousness───冒险；危险；艰险

populous nation───人口大国

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 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.───确实在探险中，他们经常面临着各种最有危险性的艰难和险阻。

It is true that during their explorations they often faced difficulties and dangers of the most perilous nature.───确实，在探险中他们经常遇到惊心动魄的困难和危险，