Cardboards
(cardboard 的复数) n. 薄纸板\\n[化] 咭纸; 特等纸板; 卡纸板; 卡片纸板
🗣️ 情景例句
I'm sorry, Mom.
我很难过， 妈妈。
When the fruit is scarcest, its taste is sweetest.
物以稀为贵。
Even more processes are never patented at all but kept as secret processes.
更多的工艺过程根本就不会取得专利权，而是作为秘方保存着。