air bottle

例句：

1. 1. We need to keep our air bottle filled with fresh air.
   我们需要保持我们的氧气瓶充满新鲜空气。
2. 2. The doctor gave her a prescription for an air bottle.
   医生给她开了一个氧气瓶的处方。
3. 3.He carried the oxygen bottle in his backpack during the long flight.
   在漫长的飞行中，他背着氧气瓶。