R acid
[化] R酸; 2-萘酚-3,6-二磺酸
🧩 词语组成解析
🗣️ 情景例句
and they always will be.
将来也永远会如此。
Children learn to creep ere they can go.
孩子要走路，先得学爬行。
One of the first things Annie did was to teach me how to play.
安妮首先要做的事情之一，就是教我如何耍。