Spanish phrase
Es cierto que ~.
Meaning
It is true that ___.
When to use it
It acknowledges a factual point. It expresses gentle agreement with an observation and often leads into a follow-up or contrast.
Example dialogue
Es cierto que las clases son difíciles.
It is true that the classes are difficult.
Sí, pero con esfuerzo se puede mejorar.
Yes, but with effort one can improve.