Pipecolinic acid
[化] 2-哌啶酸
🧩 词语组成解析
🗣️ 情景例句
Where are you working now?
你现在在哪里工作？
It's raining cats and dogs.
下着倾盆大雨。
We had some shoes like those a month ago,but we don't have any now.
一个月前我们有这要的鞋。但是现在没有了。