labral gland

例句：

1. 1. The labral glands are responsible for producing saliva.
   颌下腺负责产生唾液。
2. 2. The labral glands play a crucial role in maintaining the balance of the body's fluids.
   颌下腺在维持身体液体平衡中起着至关重要的作用。
3. 3. In some cases, the labral glands can become enlarged due to an infection or inflammation.
   在某些情况下，由于感染或炎症，颌下腺可能会肿大。