A. indicate /'indikeit/ v. 手指
B. evacuate /'iv æ ktjueit/ v. 疏散, 撤出
C. depressurization/diːˌpreʃəraɪˈzeɪʃn/ 释 压
D. oxygen /ˈɒksɪdʒən/ mask /mɑːsk/氧气面罩