人活着必须呼吸氧气。
现在想想实际上就是人们利用冬季鱼儿需要呼吸氧气的原理捉鱼的。
Now thinks that in fact is the people USES the winter fish to need the breathe oxygen the principle to seize the fish.
导致呼吸困难的因素，并不是每次呼吸氧气不足，而是因为机体变热需要更多的氧气冷却自己。
Breathing more likely becomes labored not because of a lack of oxygen with each breath, but because the body is running hotter and needs more oxygen to cool itself.
液氧经气化后由供气系统供给无任何污染的纯氧气代替工业氧气钢瓶为医院病员提供干净的呼吸氧气。
After evaporation of liquid oxygen, the air-supply system will offer pure oxygen without any pollution. Instead of industry oxygen bottle and provide patients with clean respiratory oxygen.
大多数人会在一分多钟没有空气的环境中觉得恐慌，但是自由潜水员可以在不呼吸氧气的情况下，在水下屏息更长的时间。
Mostpeople panic after a little more than a minute without air, but freedivers—divers who don't use oxygen—can hold their breath for muchlonger.
船用便携式医用吸氧器，内有氧气，压力12kpa，附有呼吸面罩，中英文用法说明。
Marine portable medical oxygen, and there are oxygen, pressure 12kpa, with breathing masks, instructions in both English and Chinese.
船用便携式医用吸氧器，内有氧气，压力12kpa，附有呼吸面罩，中英文用法说明。
Marine portable medical oxygen, and there are oxygen, pressure 12kpa, with breathing masks, instructions in both English and Chinese.
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