剑桥词典a large aircraft without wings , used especially in the past, consisting of a large bag filled with gas that is lighter than air and driven by engines . Passengers were carried in a structure hanging below. （软式）飞艇（尤在旧时使用的大型飞行器，艇身为充满轻于空气气体的气囊，由发动机提供动力，下部为封闭的载人吊舱） 返回 airship