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QUICK ANSWER
"El cual" is a phrase which is often translated as "which", and "lo cual" is a phrase which is also often translated as "which". Learn more about the difference between "el cual" and "lo cual" below.
el cual
A phrase is a group of words commonly used together (e.g., once upon a time).
1. (general)
a. which (things, animals)
El edificio posee un moderno gimnasio, el cual está localizado en la planta baja.The building features a modern gym, which is located on the first floor.
b. that (things, animals)
A último momento, el presidente decidió no utilizar el discurso en el cual pasé horas trabajando.At the last moment, the president decided not to use the speech that I spent hours working on.
lo cual(
loh
kwahl
)A phrase is a group of words commonly used together (e.g., once upon a time).
