快速答案
através de 字面表示穿过空间；por meio de 最准确地表示方法或工具。
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
através de
through or across
Use através de for movement from one side to another, or figuratively through an intermediary.
por meio de
by means of
Use por meio de for the instrument, method, or resource used to achieve something.
如何选择
- através de: Choose através de if the sentence points to movement from one side to another, or figuratively through an intermediary.
- por meio de: Choose por meio de if the sentence points to the instrument, method, or resource used to achieve something.
例句
A luz entrou através da janela.
The light came through the window.
O pagamento foi feito por meio do aplicativo.
The payment was made through the application.
常见误区
Figurative através de is established in current usage, but formal prose often prefers por meio de when no crossing is involved.
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 através de，一次用 por meio de。如果两个版本都可以，说明意思怎样变化。