Usages of mientras que
El mandato informal se usa con amigos, mientras que el formal es para situaciones serias.
The informal command is used with friends, while the formal one is for serious situations.
Caminamos lentamente mientras que ellos corren rápidamente.
We walk slowly while they run quickly.
La vaca nos da leche fresca, mientras que el cerdo come mucha comida sobrante.
The cow gives us fresh milk, while the pig eats a lot of leftover food.
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