植物的基部叶片通常比顶部的更大。

The ___basal leaves of the plant are usually larger than the top ones.

掌握基本数学技能是学习高等数学的基础。

Mastering ___basal math skills is essential for advanced mathematics.

这些植物的基部叶片比其他部分更厚实。

The ___basal leaves of these plants are thicker than other parts.