Propolis is a resinous substance collected by bees from the buds of some trees and flowers that is used to repair damage to their hives, and to protect the hive from diseases.

• 蜂胶是一种极为稀少的天然资源，素有"紫黄金"之称。是蜜蜂从植物的芽苞、树皮或树干上采集来的树脂，并混入其上额腺分泌物、蜂蜡和少量花粉加工而成的一种具有芳香气味的胶状混合物。