Complex sentence: She won three gold medals in Singles, Doubles and Mixed-Doubles and of particular interest, she won the Singles'champion for the third time and Doubles for the fourth time, records which are hard to break in the future.
Split into simpler sentences: She won three gold medals in Singles, Doubles and Mix-Doubles at the end. Especially she won the Singles'champion for the third times and Doubles for the fourth times, those spectacular records were hard to be broken in the future.