Actinide series
[机] 锕系元素
🧩 词语组成解析
n. [化]锕类
🗣️ 情景例句
Yes? Can I do something for you?
什么事？我能为您效劳吗？
No. I've been visiting relatives.
没有，我走亲戚去了。
No. Where's Jim? asked Ann.
“没有。吉姆在哪儿？”安问。