Pentamer
n. [化]五聚物, 五节聚化物
🗣️ 情景例句
Have you ever been to a buffet dinner?
你去吃过自助餐吗？
My brother is a member of the faculty.He teaches economics.
我的兄弟是全体教员中的一员，他是教经济学的。
However, rescue operations are proving difficult.
然而，事实证明营救工作非常困难。