basal spur

例句：

1. 1. The plant's basalspur is a crucial part of its growth.
   植物的基部突起是其生长的关键部分。
2. 2. The animal's basalspur was used to protect the vulnerable partsof its body.
   动物的基部突起用于保护其脆弱的身体部位。
3. 3. Thescientist found that the basal spur of theplant had a significant impact on its growthrate.
   科学家发现，植物的基部突起对其生长速度有显著影响。