Actinide series
[机] 锕系元素
🧩 词语组成解析
n. [化]锕类
🗣️ 情景例句
She's doing fine, thank you.
她很好，谢谢你。
Nothing for nothing.
不费力气，一无所得。
You speak English without an accent.
你说英语一点口音也没有。