Pericambium
周边形成层(指根的中心柱最外部细胞层)
🗣️ 情景例句
This is she.
我就是。
She feared the arrival of the bill-collector.
她害怕收帐人来。
It was at Charlie's wedding. You were playing the piano.
那是在查理的婚礼上，你在弹钢琴。