oxygen tan的用法和樣例：
例句
- Mountain climbers often carry oxygen tanks because the air is very thin at high altitudes.
登山者通常會攜帶氧氣筒，在極高的地帶空氣相當稀薄。 - As I was seated in the waiting room for an appointment with my doctor, a lady came in carrying a portable oxygen tank with tubes connected to her nose.
我坐在醫生的候診室里等候著，一位手提小型氧氣筒的女士走進來，幾條凌亂的膠管從氧氣筒連到她的鼻孔里，這女士口中偶爾的發出喃喃咒語。
