Sesquioxide
n. [化]倍半氧化物,三氧二某化合物
??? 情景例句
I want to. I haven't paid for your dinner for a long time.
我要做。我好久沒幫你付吃飯的錢了。
We can't decide when to leave.
我們不能決定什么時候離開。
OK. Thanks.
好吧，謝謝。