Yui is trapped in the abandoned supply base, and the BETA have broken through the defense lines.  With no hope of escape, she attempts to destroy the prototype cannon to keep it from falling into the wrong hands...
That's why you need to make sure you listen 
to every word of this next lecture.
¡Y precisamente por eso,
¡Y precisamente por eso,
Por isso, prestem muita atenção em cada palavra dessa lição.