alert pheromone

例句：

1. 1. The bees aresensitive to the chemical compounds in theflowers, which can alert them to potentialthreats.
   蜜蜂对花中的化合物敏感，这些化合物可以提醒它们潜在的威胁。
2. 2. Thescent of the pheromone isa crucial factor in the mating behaviorof many insects.
   这种信息素的气味是许多昆虫交配行为的关键因素。
3. 3. Insects use pheromones tocommunicate with each other and avoid predators.
   昆虫使用信息素来相互沟通并避免捕食者。