Retin-a
全反维生素A酸
🧩 词语组成解析
[医]维A（维生素A衍生物类）[词缀]
🗣️ 情景例句
Are you all right?
你还好吗？
It all depends.
视情形而定。
No one could account for the fact that one of the boxes was extremely heavy.
其中有只箱子特别重，可谁也弄不清是怎么回事。