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
Put your cards on the table.
把牌都摊到桌面上。
Should I go this way,or that way?
我应该这样去,还是那样？
Well, I couldn't sleep last night.
啊，我昨晚上没睡好觉。