Epithelium also lines the air tubes and lung cavities.
来自互联网
2. 窦的壁衬盖着内吞细胞，这些细胞能吞食淋巴中可能出现的任何一种外来颗粒。
The walls of the sinuses are lined with endocytic cells which engulf any foreign particles that might be present in the lymph .
来自互联网
3. 本机磨辊上装有可更换耐磨衬板，连续使用寿命可达一年以上，磨损严重时，移开机盖即可更换。
The machine is equipped with a removable roller wear-resistant lining, continuous service life of up to one year or more, wear serious, remove the lid can be replaced.
来自互联网
4. 本机磨辊上装有可更换耐磨衬板，连续使用寿命可达一年以上，磨损严重时，移开机盖即可更换。
The machine is equipped with a removable roller wear-resistant lining, continuous service life of up to one year or more, wear serious, remove the lid can be replaced.
