镇定自若，沉着冷静，从容不迫，临危不乱

1. composure, calmness, self-possession, presence of mind

adjectival nouns or quasi-adjectives (keiyodoshi) noun (common) (futsuumeishi)

沉积（于底部）、沉积作用、积累、附着

2. depositing (at the bottom), deposition, accumulation, adherence

intransitive verb noun or participle which takes the aux. verb suru noun (common) (futsuumeishi)