to meet by chance, run into

opinion, assertion, contention

maintain, argue, claim

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

he; boyfriend

遺跡: remains

衛生: hygiene, sanitary, health / 衛星: (astronomy) satellite / 永世: eternity, permanence, perpetuity, immortality / 永逝: death, demise

線形性: linearity

曳船: tugboat