Complex sentence: These bytes are used to address bytes within the 32 kbit (4 kB) supported by that EEPROM; the same two-byte addressing is also used by larger EEPROMs, such as 24c512 ones storing 512 kbits (64 kB).
Split into simpler sentences: These bytes are used to address bytes within the 32 kbit (or 4 kB) EEPROM address space. The same two-byte addressing is also used by larger EEPROMs, such as the 24c512 which stores 512 kbits (or 64 kB).