salivary pellicle

例句：

1. 1. The scientist observed the saliva pellicle on the surface of the sample.
   科学家观察了样本表面的唾液膜。
2. 2. The doctor advised the patient to maintain good oral hygiene by regularly cleaning the saliva pellicle.
   医生建议病人通过定期清洁唾液膜来保持良好的口腔卫生。
3. 3. The researcher found that the saliva pellicle plays a crucial role in the digestion process.
   研究者发现唾液膜在消化过程中起着至关重要的作用。