快速答案
estádio 是体育场；estágio 是实习或发展阶段。
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
estádio
stadium
Use estádio for a large sports venue with seating for spectators.
estágio
internship or stage
Use estágio for practical training or one phase in a continuing process.
如何选择
- estádio: Choose estádio if the sentence points to a large sports venue with seating for spectators.
- estágio: Choose estágio if the sentence points to practical training or one phase in a continuing process.
例句
A final será disputada no estádio municipal.
The final will be played at the municipal stadium.
Ela começou um estágio no hospital.
She started an internship at the hospital.
常见误区
The consonant and stress both matter. An estágio profissional happens at work, not necessarily in an estádio.
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 estádio，一次用 estágio。如果两个版本都可以，说明意思怎样变化。