Knopite
铈钙钛矿(钛酸钙矿夹杂氧化铯及氧化铁)
🗣️ 情景例句
Jnice to have you with us.
很高兴你能跟我们在一起。
She is at a loss as what to do.
她不知怎么办才好。
The constitution guards the liberty of the people.
宪法保护人民的自由。