学习英语时，理解单词的形态结构有助于记忆。

Understanding word ___morphologies helps with memorization when learning English.

科学家们研究了不同植物叶子的形态结构。

Scientists studied the ___morphologies of leaves from different plants.

生物学家研究植物叶片的形态以了解其生长模式。

Biologists study the ___morphologies of plant leaves to understand their growth patterns.