快速答案
perigo 是危险源或危险状态；risco 衡量暴露程度或发生概率。
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
risco
risk
Use risco for the possibility, probability, or exposure to an unwanted result.
perigo
danger or hazard
Use perigo for a person, object, or situation capable of causing harm.
如何选择
- risco: Choose risco if the sentence points to the possibility, probability, or exposure to an unwanted result.
- perigo: Choose perigo if the sentence points to a person, object, or situation capable of causing harm.
例句
Há risco de atraso por causa da chuva.
There is a risk of delay because of the rain.
O vazamento representa perigo para os moradores.
The leak poses a danger to residents.
常见误区
A dangerous chemical is a perigo. The risco depends on dose, contact, controls, and probability.
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 risco，一次用 perigo。如果两个版本都可以，说明意思怎样变化。