快速答案
viagem 强调旅行和距离；passeio 强调休闲出游或参观。
可靠的方法是先判断这个词在句子里的功能，再翻译。
每个词的作用
viagem
trip or journey
Use viagem for travel to another city, region, or country, often with distance or an overnight stay.
passeio
outing, tour, or stroll
Use passeio for a shorter leisure activity, visit, ride, or walk.
如何选择
- viagem: Choose viagem if the sentence points to travel to another city, region, or country, often with distance or an overnight stay.
- passeio: Choose passeio if the sentence points to a shorter leisure activity, visit, ride, or walk.
例句
Nossa viagem à Bahia durou uma semana.
Our trip to Bahia lasted a week.
Fizemos um passeio de barco.
We went on a boat tour.
常见误区
A passeio can happen during a viagem. The first is an activity; the second is the broader journey.
放到语境中练习
从你的真实生活中选一个句子，写两遍：一次用 viagem，一次用 passeio。如果两个版本都可以，说明意思怎样变化。