Chelators
(chelator 的复数) n.[化]螯合剂
🗣️ 情景例句
Now maybe...
也许现在……
She sent me a Christmas card last year.
去年寄过一张圣诞卡。
It was his job to repair bicycles and at that time he used to work fourteen hours a day.
他那时的工作是修理自行车，并且通常是一天工作14个小时。