Malonamide
丙二酰胺
🗣️ 情景例句
That's music to my ears.
正合我意。
I dropped the letter in the mailbox on the corner.
我把信放到角落上的邮箱里。
He was rather elderly with grey hair and clear blue eyes.
他上了年纪，有着灰白的头发和明亮的蓝眼睛。