Actinium series
[化] 锕系(指89~103号元素)
🧩 词语组成解析
n. 锕\\n[化] 锕Ac
🗣️ 情景例句
He sounds just like the person we need for the job.
听起来他正是我们所需要的人，适合在这里做事。
I know the boy whose father is a missionary.
我知道那个男孩的父亲是传教士。
Come straight along here, please.
请直接沿这里走过来。