The molars are the teeth located at the back of the mouth.

臼齿的作用是什么？

Their primary role is to crush and chew food before swallowing.

孩子有几颗臼齿？

In the primary (child) dentition there are 8 molars (4 maxillary and 4 mandibular).

In the permanent (adult) dentition there are 12 molars (6 maxillary and 6 mandibular).

臼齿位于口腔后部。在乳（儿童）牙列中有 8 个臼齿（4 个上颌和 4 个下颌）。在永久（成人）牙列中，有 12 个臼齿（6 个上颌和 6 个下颌）。它们的主要作用是在吞咽前压碎和咀嚼食物。