1、cruise是一个英文单词，形容词作为名词基本含义为航行;乘船游览；作为动词基本含义为巡航;乘船游览;以平稳的速度行驶;慢速行驶，巡行。第三人称单数：cruises，现在进行时：cruising，过去式：cruised，过去分词：cruised。

2、例句为The aircraft had reached its cruising altitude of about 39,000 feet飞机已到达约9万英尺的巡航高度。