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
I like the color on me, don't you?
我觉得这种颜色较适合我，你说呢？
He should see the doctor.
他应该去看医生。
Why not?
怎么会呢？