Complex sentence: Fukushima, their science teacher, explains Kazuko's new ability to be called "teleportation" and "time-leap", and to solve the riddle of her power she must leap back four days.
Split into simpler sentences: Fukushima, their science teacher, explains Kazuko's new ability as "teleportation" and "time-leap". To solve the riddle of her power she must leap back four days.