He's got his oxygen on, and the portabletank next to him on the rug like a faithful dog.
他已戴上氧气罩，旁边的便携式氧气罐就像一只忠诚的狗一样躺在地毯上。
2
He's got his oxygen on, the portabletank next to him on the rug like a faithful dog.
他已戴上氧气罩，那可移动的氧气罐放在他身旁的地毯上，像条忠实的狗。
3
An underwater weighing tank in the exercise physiology department at a local university is another option (some gyms occasionally offer measurements taken in portable tanks).