chemidin

例句：

1. 1.The ant was attracted to the chemical signal on the leaf.
   蚂蚁被叶子上的化学信号吸引。
2. 2.The study of chemical signals is crucial for understanding animal behavior.
   研究化学信号对于理解动物行为至关重要。
3. 3. The chemical signal is a form of communication between organisms.
   化学信号是一种生物之间的通讯方式。