Pbd
abbr. paperboard 纸板; particle board 刨花板，木屑纤维板
🗣️ 情景例句
You must observe these simple rules.
你必须遵守这些简单的规定。
When the tree is fallen, every one runs to it with his axe.
大树一倒下，人人持斧来。
Aren't you lucky!
你们真幸运！