危险的旅行用英语可以说作 "dangerous journey"。危险是英语 "danger" 的形容词形式，意思是有害或有潜在危险的。旅行是英语 "journey" 的名词形式，意思是去某个地方并回来的旅程。因此，"dangerous journey" 可以用来描述有危险的旅行。
这两个词都来自中世纪拉丁语，"danger" 来自拉丁语 "periculum"，意思是危险，而 "journey" 来自拉丁语 "diurnus"，意思是一天的行程。
例句：
It was a dangerous journey, but we made it through safely.
这是一次危险的旅行，但我们平安度过了。
I wouldn't recommend taking that route - it's a dangerous journey.
我不建议您沿着那条路走——那是一次危险的旅行。
The explorers knew that the journey ahead would be dangerous, but they were determined to complete it.
探险家们知道前面的旅程会很危险，但他们决心完成它。