Caesium
[医] 铯(55号元素)
✅ 同义词
🗣️ 情景例句
What's it about?
是关于什么的？
He alone is poor who does not possess knowledge.
没有知识，才是贫穷。
What will you do if you win a lot of money?
要是你赢了许多钱，你打算做什么呢？