red gland

例句：

1. 1. The red gland on the back of the hand is a small bump that can be painful.
   手背上的一个小疙瘩可能是一个疼痛的来源。
2. 2. The red glands in the eyes are responsible for protecting them from dust and other foreign particles.
   眼睛中的红色腺体能保护它们免受灰尘和其他外来颗粒的侵害。
3. 3. The red glands on the skin are called sebaceous glands and they produce oil that keeps the skin moisturized.
   皮肤上的红色腺体叫做皮脂腺，它们分泌油脂以保持皮肤湿润。