Picolinic acid
[建] 啶甲酸-[2]
🧩 词语组成解析
🗣️ 情景例句
Brown was friendly and easy-going.
布朗待人友善。
I tried to telephone you but I couldn't get through.
我试着打电话给你，但都没有打通。
How do you do?
您好！