tracheal gland

例句：

1. 1. The tracheal glands are responsible for producing the mucus that coats our airways.
   气管腺负责产生覆盖我们呼吸道的黏液。
2. 2. In some species, the tracheal glands produce a substance that can help protect against infection.
   在某些物种中，气管腺会产生一种物质，有助于抵御感染。
3. 3. The tracheal glands are located in the throat and play a crucial role in maintaining the health of the respiratory system.
   气管腺位于喉咙部位，对维护呼吸系统的健康起着至关重要的作用。