Placodium
产囊原基层, 囊壳孔口处的硬皮层
🗣️ 情景例句
When no settlement can be reached, the disputes shall be submitted for arbitration.
如果协商得不到解决，应将争议提交仲裁。
Let me introduce myself.
让我做个自我介绍吧。
It's smaller than the blue one.
它比那件蓝色的还要小。