Dioctahedral
二八面体的(晶体结构)
🗣️ 情景例句
The pollution in Beijing is alarming.
北京的污染给人们敲起了警钟。
If I went with you,I'd have to be back by six o'clock
如果我与你一起去了，我将不得不在6点钟回来。
No, it's not him.
不对，也不是他。