plant kingdom

例句：

1. 1. The study of plants is essential for understanding the natural world.
   研究植物对于理解自然界至关重要。
2. 2. The diversity of plant species in a forest can tell us a lot about its ecosystem.
   森林中植物物种的多样性可以告诉我们很多关于其生态系统的信息。
3. 3. The plant kingdom contains over 300,000 species, making it one of the largest and most diverse groups of life on Earth.
   植物王国拥有超过30万种物种，使其成为地球上最大的和最多样化的生命群体之一。