secondary thickening

• 次生加厚

secondary thickening的用法和样例：

例句

1. The cell wall has undergone secondary thickening, and is often lignified.
   细胞壁多发生木质化而次生加厚。
2. It may develop by thickening of the secondary walls of parenchyma cells, or it may arise directly from meristematic cells.
   它们可能由薄壁组织的细胞壁次生加厚而成，也可能直接来自于分生组织细胞。