Formohydrazide
甲酰肼
🗣️ 情景例句
She is giving me piano lessons in exchange for her English classes.
我教她英语，她教我弹钢琴。
A good dog deserves a good bone.
有劳得奖。
He called out to the children and threw the ball back to the bank.
他大声叫着那些孩子，把球扔回到岸上。