Picolinic acid
[建] 啶甲酸-[2]
🧩 词语组成解析
🗣️ 情景例句
It was so stupid of me. I really do apologize.
非常抱歉， 我当时真糊涂。
Wisdom is a good purchase though we pay dear for it.
我们为了求知识，付出高价也值得。
But animals of this age do not easily become subservient to man,
但这个年龄的象不易驯服，