The bug is found in saliva and normally causes no problems.(这种病毒存在于唾液中，一般是不会有什么问题的。)
When the bell comes connected with food, there's a lot of saliva.(当铃声和食物形成了联系，狗会因为铃声的出现而分泌大量唾液。)
And to get saliva he had to have dogs.(为了弄到唾液，他找来了几条狗。)
They make the saliva that drains into your mouth.(它能制造唾液流进你的口腔。)
They're all over each other sometimes and viruses and vaccines can spread saliva or other fluids.(有时候他们会缠绵不休，而且病毒和疫苗可以传播唾液或其它液体。)
Digestion begins in the mouth with the action of saliva.(消化是在口腔中唾液的作用下开始的。)
Over and over again, if you put the bell and the food together, pretty soon, the bell will generate saliva.(如果你一再让铃声和食物同时出现，很快，铃声便会促使唾液分泌。)
Members of highly ranked groups can be polluted by coming into contact with bodily secretions, particularly saliva, of individuals of lower-ranked castes.(社会地位高的人接触到社会地位低的人的身体分泌物，特别是唾液，就会受到污染。)
These tests may involve taking blood or saliva samples.(检查时会抽取血液或唾液样本。)
