淡々と の訳語→ blithely calmly casually dully indifferently levelly matter-of-factly philosophically politely quietly
平然と の訳語→ coolly detachment imperturbably unconcerned unmoved
冷静に の訳語→ calm clearly critically dispassionately rational rationally reservedly silently soberly
はっきり の訳語→ actually baldly beautifully broad certain certainly clear consciously crystal clear declarative definite definitely distinctly do easily evidently exactly explicitly finally firm frankly great hard-edged honestly just must obvious outright perfectly precisely prominent properly quite radically really recognizably right specific stark straight sure vividly well