Operation Crash-Dive空中谍影
crash-dive紧急下潜
C crash dive紧急下潜
同义词：crash-dive
N（名词） a sudden steep dive from the surface by a submarine (潜水艇)紧急下潜
V（动词） (usually of an aircraft) to descend steeply and rapidly, before hitting the ground (飞机落地前的)急速下降