Some [the unadulterated brahmacārīs] sacrifice the hearing process and the senses in the fire of mental control, and others [the regulated householders] sacrifice the objects of the senses in the fire of the senses.
such as the hearing process
senses
others
of restraint
in the fires
offer
sound vibration, etc.
objects of sense gratification
others
of the sense organs
in the fires
they sacrifice.