saliva drug level

例句：

1. 1. The dentist advised me to spit out my saliva before the procedure.
   牙医建议我在手术前吐掉我的唾液。
2. 2. The scientist collected samples of saliva from different people.
   科学家从不同人那里收集了唾液样本。
3. 3. Saliva is a vital component in digestion and helps break down food.
   唾液在消化中起着至关重要的作用，帮助分解食物。