快速拉动氧气面罩，开始供氧。
A Quickly turn on the oxygen system, the mask begins to supply oxygen.
B Pull the oxygen mask with a sudden movement to start the flow of oxygen.
C Suddenly start the oxygen supply system, the lake drops.
A Quickly turn on the oxygen system, the mask begins to supply oxygen.
B Pull the oxygen mask with a sudden movement to start the flow of oxygen.
C Suddenly start the oxygen supply system, the lake drops.