Polygalacturonic acid
[化] 聚半乳糖醛酸
🧩 词语组成解析
🗣️ 情景例句
Your father's a wonderful doctor, Richard.
你父亲是个了不起的医生， Richard。
Is there any way of ensuring we'll have enough time for our talks?
我们是否能保证有充足的时间来谈判？
Was he absent from school last week?
上星期他没上学吧？