hydrotropism

例句：

1. 1.The plant's ability to grow in water is a key factor in its survival.
   这种植物能在水里生长，这是它生存的关键因素。
2. 2. Hydrotropism is an adaptation that allows plants to survive in environments with limited soil.
   水生植物的向水性是一种适应，使它们能在土壤稀缺的环境中生存。
3. 3.The study of hydrotropism has led to the development of new techniques for growing crops in marginal lands.
   对水生植物向水性的研究已经导致了在边际土地上种植作物新技术的开发。