Diisotactic
双全同立构的
🗣️ 情景例句
I'm calling to ask you some questions about Susan.
我打电话是想问一些关于苏珊的事。
Is it long drive from here to the dapartment store?
从这里到百货公司开车也要走很多时间。
Excuse me. Is there a bookshop near here?
请问，附近有书店吗？