juypter ntebook中 以下是什么意思 请帮我标注he units are divided into three flight classes depending on whether the unit is operating short-length flights ie flight class 1 medium-length flights ie flight class 2 o

he units are divided into three flight classes depending on whether the unit is operating short-length flights (i.e., flight class 1), medium-length flights (i.e., flight class 2), or long-length flights (i.e., flight class 2). A number of real flight conditions are available within each of the flight classes.

• "divided into three flight classes": 分为三个航班等级
• "short-length flights": 短途航班
• "medium-length flights": 中途航班
• "long-length flights": 长途航班
• "real flight conditions": 真实的飞行条件