phytoecdysone

例句：

1. 1. The plant hormone auxin is essential for plant growth.
   植物激素生长素对植物生长至关重要。
2. 2. The plant hormone gibberellic acid promotes flowering in plants.
   植物激素赤霉素促进植物开花。
3. 3. The plant hormone cytokinins play a crucial role in the growth and development of plants.
   植物激素细胞分裂素在植物的生长和发育中起着关键作用。