Isotachyte
等规聚合物, 全同立构聚合物
🗣️ 情景例句
Except for the beard, he hasn't changed in fifty years.
除了有胡须， 他五十年来没有变。
Do you often study history on Saturday?
你常常在星期六学历史吗？
Why did you run away from me?
你为什么从我身边跑开？