Pectinic acid
[化] 果胶酯酸
🧩 词语组成解析
🗣️ 情景例句
When I was asked to speak in English.
刚才当被要求说英语的时候。
Where (or While) there is life there is hope.
留得青山在，不怕没柴烧。
Good.we can't extend the deadline.
那好，我们可不能延期的。