快速答案
比较巴西葡萄牙语中的 problema vs. questao：何时使用每个词，以及要避免的常见错误。
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
problema
problem
Use problema for a difficulty, defect, conflict, or thing that needs fixing.
questao
question, issue, or matter
Use questao for a topic, exam question, issue, or point under discussion.
如何选择
- problema: Choose problema if the sentence points to a difficulty, defect, conflict, or thing that needs fixing.
- questao: Choose questao if the sentence points to a topic, exam question, issue, or point under discussion.
例句
Temos um problema no sistema.
We have a problem in the system.
Essa questao e delicada.
This issue is delicate.
常见误区
Use questao when you mean topic or issue without necessarily saying something is broken.
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 problema，一次用 questao。如果两个版本都可以，说明意思怎样变化。