Plumbogummite
水磷铝铅矿
🗣️ 情景例句
I've been invited to give a talk at the conference.
我已受邀在大会上发言。
We've arranged our schedule without any trouble.
我们已经很顺利地把活动日程安排好了。
then administrative overheads will be low.
行政管理费用就会降低。