在物理力学性质指标中成熟材的基本密度、气干密度、顺纹抗压强度、抗弯强度、抗弯弹性模量及冲击韧性高于幼龄材；
In physical and mechanical indexes, the basic density, air-dried density, compression strength parallel to grain, MOR, MOE and toughness of mature wood are higher than that of juvenile wood.
从河相关系可见，弯曲河段和微弯顺直河段基本相似，但和辫状河段有着本质的区别。
The river regimes of the meandering and straight reaches are very similar to each other but are different completely from the regime of the braided reach.
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