The smallest particles do the most damage, killing macrophages (see reticuloendothelial system) that engulf them in the pulmonary alveoli.是什么意思_The smallest particles do the most damage, killing macrophages (see reticuloendothelial system) that engulf them in the pulmonary alveoli.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句