快速答案
mandar 含义更广，可表示发送或命令；enviar 专指把某物发送出去。
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
mandar
to send or order
Use mandar for everyday sending, giving instructions, or having something done.
enviar
to send or dispatch
Use enviar for explicit transmission of messages, files, documents, or packages.
如何选择
- mandar: Choose mandar if the sentence points to everyday sending, giving instructions, or having something done.
- enviar: Choose enviar if the sentence points to explicit transmission of messages, files, documents, or packages.
例句
Mandei uma mensagem para ela.
I sent her a message.
Enviei os documentos por e-mail.
I sent the documents by email.
常见误区
Mandar alguém fazer algo means order or tell someone to do it, not send that person a file.
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 mandar，一次用 enviar。如果两个版本都可以，说明意思怎样变化。