快速答案
ética 常指对行为的理性或专业审视；moral 常指群体遵循的价值和规范。
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
ética
ethics
Use ética for principles used to examine conduct, including professional standards and reasoned systems.
moral
morality or moral rules
Use moral for values and rules of right and wrong held by a person, community, or tradition.
如何选择
- ética: Choose ética if the sentence points to principles used to examine conduct, including professional standards and reasoned systems.
- moral: Choose moral if the sentence points to values and rules of right and wrong held by a person, community, or tradition.
例句
O comitê discutiu a ética da pesquisa.
The committee discussed research ethics.
A decisão contrariou a moral da época.
The decision went against the morality of the period.
常见误区
Writers and philosophers define the boundary in different ways. Use the terms consistently rather than treating this practical distinction as absolute.
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 ética，一次用 moral。如果两个版本都可以，说明意思怎样变化。