蜜蜂的巢穴阴暗、狭小，怎样才能避免各种病原体的感染？被蛰死的较大敌虫又拖不出去，如何防止其腐烂在巢穴？如何清洁环境和保证冬贮蜂粮不变质？聪明的蜜蜂在自然界中找到了解决的办法。蜜蜂通过采集植物的树脂或芽胶，再混合自身分泌物调制出一种胶状物质即蜂胶。蜜蜂用蜂 How can the bees’ nests be dark and narrow to avoid infection by various pathogens? The larger enemy that had been killed was unable to get out. How to prevent it from rot in the lair? How to clean the environment and ensure the quality of winter storage bees? The smart bees found a solution in nature. The honeybee collects the resin or bud of the plant and then mixes its own secretions to prepare a gelatinous substance called propolis. Bee with bee