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
OK. I'll let you get back to your work.
好，你过去工作吧。
From which station does the train leave?
这列火车从哪个站开出呢？
It's my favourite. Fish and chips.
是我最喜爱的。炸鱼和土豆片。