Celestobarite
锶重晶石
🗣️ 情景例句
Michelle, your turn.
Michelle，该你了。
Competition for this kind of goods is tough.
这种商品的竞争非常激烈。
I like folk music. I write my own songs and I play the guitar as well.
我喜欢民间音乐。我唱的歌自己谱曲，我也弹吉他。