血红细胞也能够通过肺呼气清除细胞内的二氧化碳和废弃物，我们可以看出，他们在机体中发挥着非常重要的作用。
Red blood cells also remove carbon dioxide, a waste product, from cells and carry it to the lungs to be exhaled, so as we can see, they have a very important role in the human organism.
宋医生写到，一旦纳米颗粒进入肺细胞，就不可能再被清除出来。
It is impossible to remove nanoparticles once they penetrate lung cells, wrote Song.
在帮助增加水分，增强肺功能和清除小肠热方面燕窝也有明显的治疗作用。
Bird's nests also show obvious therapeutic effects to help moisturize and replenish the lung and clear away intestinal heat.
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