Report heading and flight level.
报告航向和飞行高度层。
Pilot: Wilco.... Air Canada at Flight Level 90.
飞行员：遵守指令。……加拿大航空飞行高度90。
CRUISE altitude, An altitude or flight level maintained during enroute level flight.
巡航高度，在航线上水平飞行期间，飞机所保持的高度或飞行高度层。
This difference in lift can make it hard to maintain level flight.
这种差异能够产生保持直升机水平飞行的升力。
Let's begin with Level Flight.
咱们从水平飞行开始。
Flight space: not over 1500 meters above sea level.
飞行空域：飞行高度不得超过海拔1500米。
To the level of a pilot capable of performing beyond the basics of Sideways Flight .
第六级属于高级程度，使操控者有能力执行基础的横向飞行。
The level of a pilot capable of performing beyond the basics of Backward Flight.
第五级属于高级程度，使操控者有能力执行基础的后退飞行。
Base a high level of specialized flight team.
基地有高水平的专业化飞行队伍。
The air pressure in a plane during flight is lower than at sea level.
飞行中飞机内的气压低于海平面的大气压。
The air pressure in a plane during flight is lower than at sea level.
飞行中飞机内的气压低于海平面的大气压。
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