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氧气, O₂
a chemical element in gas form with no color that living things need for breathing
- Trees release oxygen into the atmosphere as a byproduct of photosynthesis.
树木通过光合作用释放氧气到大气中。
- Divers carry tanks of compressed oxygen to breathe underwater.
潜水员携带压缩氧气罐在水下呼吸。
- The doctor administered oxygen to the patient to help with breathing difficulties.
医生给病人施用了氧气以帮助缓解呼吸困难。
- Oxygen is necessary for the combustion process in engines and fires.
氧是发动机和火灾中燃烧过程所必需的。
- Blood transports oxygen from the lungs to the tissues of the body.
血液将氧气从肺部输送到身体的组织。