編按：作者表示，「那年，父親七十九歲，中年曾動過心臟手術的他，身體雖稱不上硬朗，但生活打理、行動力皆自在裕如， […]A bomb cyclone is often a immediate drop in air pressure �?no less than 24 millibars in 24 hours �?and often is over or close to oceans or seas because it needs heat moist air