Actinide series
[机] 锕系元素
🧩 词语组成解析
n. [化]锕类
🗣️ 情景例句
but there must be a way
但总该有一个办法
Won't you be embarrassed to leave the party early?
你提早一点离开宴会也无妨吧？
Who served you, sir?
是谁接待您的，先生？