A--boarding/to board a plane, get into a plane B--plane ticket
C--flight, flying D--smooth flight
E--to get off a plane F--extra flight
G--non-stop flight H--forced landing
I--top speed J--first class
K--night service L--landing
M--to face the wind N--air route, air line
O--climbing, to gain height P--economy class, tourist class
Q--connecting flight R--direct flight, straight flight
S--to lose height, to fly low T--to take off, take-off

A--boarding/to board a plane, get into a plane B--plane ticket
C--flight, flying D--smooth flight
E--to get off a plane F--extra flight
G--non-stop flight H--forced landing
I--top speed J--first class
K--night service L--landing
M--to face the wind N--air route, air line
O--climbing, to gain height P--economy class, tourist class
Q--connecting flight R--direct flight, straight flight
S--to lose height, to fly low T--to take off, take-off（）头等舱（）航线

A--boarding/to board a plane, get into a plane B--plane ticket
C--flight, flying D--smooth flight
E--to get off a plane F--extra flight
G--non-stop flight H--forced landing
I--top speed J--first class
K--night service L--landing
M--to face the wind N--air route, air line
O--climbing, to gain height P--economy class, tourist class
Q--connecting flight R--direct flight, straight flight
S--to lose height, to fly low T--to take off, take-off