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
Smoking is bad for your health.
吸烟对你的健康有害。
A heavy purse makes a light heart.
腰包钱财足，心境自然宽。
You really have an ear for pop music.
你确实对流行音乐很有欣赏力。