Knopite
铈钙钛矿(钛酸钙矿夹杂氧化铯及氧化铁)
🗣️ 情景例句
How long does your vacation last?
你的假期有多长？
Not really, I'm afraid. We were delayed taking off, and we encountered a lot of bad weather.
不太好，我们起飞延误了，还遭遇了恶劣的气候。
Yes, I am.
对，我就是。