Polcard
碳酸钙盐
🗣️ 情景例句
And I'll be able to show you around our city.
我可以带你在我们那儿四处看看。
Opportunity only knocks once.
机不可失，时不再来。
He had spotted a tiny bottle at the bottom of my case and he pounced on it with delight.
他在我的箱底发现了一只小瓶，高兴地一把抓了起来。