Procambium
n. 原形成层\\n[医] 前形成层, 前新生层
🗣️ 情景例句
I'm so sorry.
很抱歉。
We know not what is good until we have lost it.
有的时候不爱惜，失了以后空叹息。
Please make sure you mark the shipment for careful handling.
请不要忘了在货物上标明“小心搬运”。