The mouse set to work at once, biting with his sharp little teeth at the heavy ropes that held the lion.

老鼠马上开始工作，用他又尖又小的牙齿咬断缚住狮子的大绳。

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To clean the biting or chewing surfaces of the teeth, hold the brush so the bristles are straight down on those surfaces.

为了清洁牙齿切端或咬合面(咀嚼食物的那一面)握牙刷是刷毛与这些面垂直。

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Teeth that have moved may be lost because of abnormal biting pressures.

牙齿因松动而脱落是因为不正常咬合的缘故。

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