Stokesite
硅钙钖石
🗣️ 情景例句
A little knowledge is dangerous.
一知半解最危险。
What is happening over there?
那里发生什么事情？
Last spring my wife suggested that I call in a man to look at our lawn mower.
今年春天，妻子让我请人检查一下我家的割草机。