age-grading

英 ['eɪdʒɡr'eɪdɪŋ] 美 ['eɪdʒɡr'eɪdɪŋ]

• 龄级

age-grading的用法和样例：

例句

1. The dry matter storage and water soluble sugar content in P. communis rhizomes increased in quadratic with increasing age class.
   随着龄级的增加，芦苇种群根茎的干物质贮量和水溶糖含量均呈二次曲线变化。