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 need some.
我确实需要。
She hesitated about what to do next.
他对下一步干什么拿不定主意。
I would like you to change this blouse, or else give me my money back.
我想要你换掉这件衬衣，要不就把钱退给我。