鉱物学: mineralogy

specialist; expert

物理学: physics

好物: one's favorite food / 鉱物: minerals / 公物: public property

生物工学: biotechnology

化学工学: chemical engineering

mineralogy

高額: large amount of money / 工学: engineering / 光学: optics / 後学: future reference / 好学: love of learning

he / distal demonstrative, something far off removed from both speaker and listener: that / boyfriend

distal demonstrative, something far off removed from both speaker and listener: that, yon / particularly, male personal third person pronoun: he / by extension from he: boyfriend