level-off调水平;进入平飞状态
pressure level-off压力趋于稳定
level-off position[航] 改平位置
level l off变平
automatic level-off自动调平
level-off rolling高温平整轧制
level measurement off调水平
level-off height改平高度
there level shut off valve三杆阀
PHRASAL VERB（动词词组） If a changing number or amount levels off or levels out, it stops increasing or decreasing at such a fast speed. 趋向稳定
The figures show evidence that murders in the nation's capital are beginning to level off.
这些数据证明该国首都的凶杀发案率正开始趋向稳定。
PHRASAL VERB（动词词组） If an aircraft levels off or levels out, it travels horizontally after having been travelling in an upward or downward direction. (飞机在爬升或俯冲后) 水平飞行
The aircraft levelled out at about 30,000 feet.
飞机在大约三万英尺的高度水平飞行。