Chelation
[化] 螯合作用; 螯环化
🗣️ 情景例句
She's not at home.
她现在不在家。
Had so much fun
玩得开心
They were in fashion last year and the year before last.But they're not in fashion this year.
这鞋在去年和前年时兴，而今年已不流行了。