Natronbiotite
钠黑云母
🗣️ 情景例句
Grandpa helped me yesterday afternoon.
昨天下午祖父帮我的忙。
Take care of small sums and the large will take care of themselves.
省小钱才能积大财。
What colour are you going to paint it?
你打算把它漆成什么颜色？