Piperonilidene
[化] 亚胡椒基
🗣️ 情景例句
Study hard and study everyday, if you want to master the English language.
如果你想精通英语的话，就得每天刻苦学习。
Karl must concentrate on his work.
卡尔必须集中精力于自己的工作。
There is a factory near No.14 Middle School.
第十四中学附近有一家工厂。