Thank you for the information although I don't see where you answered my question about what it was that you didn't understand. So, all I can do is provide you with the statute and give you a general explanation. If you need something more you will actually have to communicate what it is you do not understand in the statute.
If the charge says 460 b on it, then it would be a second degree burglary charge. Please see the statutes below and let me know if you have additional questions.
459. Every person who enters any house, room, apartment, tenement,
shop, warehouse, store, mill, barn, stable, outhouse or other
building, tent, vessel, as defined in Section 21 of the Harbors and
Navigation Code, floating home, as defined in subdivision (d) of
Section 18075.55 of the Health and Safety Code, railroad car, locked
or sealed cargo container, whether or not mounted on a vehicle,
trailer coach, as defined in Section 635 of the Vehicle Code, any
house car, as defined in Section 362 of the Vehicle Code, inhabited
camper, as defined in Section 243 of the Vehicle Code, vehicle as
defined by the Vehicle Code, when the doors are locked, aircraft as
defined by Section 21012 of the Public Utilities Code, or mine or any
underground portion thereof, with intent to commit grand or petit
larceny or any felony is guilty of burglary. As used in this
chapter, "inhabited" means currently being used for dwelling
purposes, whether occupied or not. A house, trailer, vessel designed
for habitation, or portion of a building is currently being used for
dwelling purposes if, at the time of the burglary, it was not
occupied solely because a natural or other disaster caused the
occupants to leave the premises.
460. (a) Every burglary of an inhabited dwelling house, vessel, as
defined in the Harbors and Navigation Code, which is inhabited and
designed for habitation, floating home, as defined in subdivision (d)
of Section 18075.55 of the Health and Safety Code, or trailer coach,
as defined by the Vehicle Code, or the inhabited portion of any
other building, is burglary of the first degree
. (b) All other kinds of burglary are of the second degree
(c) This section shall not be construed to supersede or affect
Section 464 of the Penal Code.