spear leaf

例句：

1. 1. The plant has a distinctive spear leaf shape.
   这种植物有独特的矛叶形状。
2. 2.The scientist collected samples from various spear leaves for analysis.
   科学家从各种矛叶中收集了样本进行分析。
3. 3. The spear leaf was used as a decoration in ancient times.
   矛叶在古代被用作装饰。