Piperonal(dehyde)
[化] 胡椒醛
🗣️ 情景例句
He owes his success more to luck than to ability.
他认为他的成功是靠运气而不是靠自己的能力。
My sister worked as a secretary before she got married.
在她结婚了以前，我的姐姐为一位秘书。
'You'll have to get off here,' the conductor said.
“您得在这里下车，”售票员说，