Actinide contraction
[化] 锕系收缩
🧩 词语组成解析
n. [化]锕类
contraction
[kən'trækʃən]
n. 收缩，缩减;[语]缩略，略体，缩写;（开支等）缩减;（分娩时）子宫收缩;
🗣️ 情景例句
Did you watch the football game between Manchester United and Arsenal last night?
昨晚你看了曼联对阿森纳的足球比赛吗？
It's hard to say.
很难说。
That's worthwhile.
那是值得的。