以下为句子列表：
英文: Based on the observation data obtained from 69 sampling sites of different age class forests, and by using biomass expansion factor function, the regression equations of stand biomass and volume of the main forest forests in Pearl River Delta were built,
中文: 摘要利用生物量转换因子连续函数法，通过69组不同龄级的森林样地实测数据，拟合了珠江三角洲主要森林类型的生物量和蓄积量之间的回归方程，并结合3个时段森林清查资料，估算了区域森林生物量及其动态。
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