Complex sentence: Depending on the depth of the traps (the energy required to free an electron from them) the storage time of trapped electrons will vary-some traps are sufficiently deep to store charge for hundreds of thousands of years.
Split into simpler sentences: Depending on the depth of the trap (the energy required to free an electron from the trap) the storage time of trapped electrons will vary. Some traps are sufficiently deep to store charge for hundreds of thousands of years.