高原地区氧气稀薄,初到的人容易感到头晕。Gāoyuán dìqū yǎngqì xībó, chū dào de rén róngyì gǎndào tóuyūn.In plateau areas the oxygen is thin, and people who have just arrived easily feel dizzy.
潜水员背着氧气瓶,慢慢潜到海底。Qiánshuǐyuán bēizhe yǎngqìpíng, mànmàn qián dào hǎidǐ.The diver, carrying an oxygen tank, slowly dives to the seabed.
植物在阳光下会吸收二氧化碳,释放出氧气。Zhíwù zài yángguāng xià huì xīshōu èryǎnghuàtàn, shìfàng chū yǎngqì.Plants absorb carbon dioxide in sunlight and release oxygen.