2 sentences

1. 保持口腔卫生非常重要。

   bǎo​chí kǒu​qiāng wèi​shēng fēi​cháng zhòng​yào.

   Maintaining oral hygiene is very important.

   Source: Dong Chinese Dictionary

2. 看到美味的食物时，人的口腔会分泌唾液。

   kàn​dào měi​wèi de shí​wù shí, rén de kǒu​qiāng huì fēn​mì tuò​yè.

   The mouth secretes saliva when one sees delicious food.

   Source: Dong Chinese Dictionary