immature wood juvenile wood 幼年材
juvenile wood selection 幼龄材选择
Increment of Juvenile wood 幼龄材生长量
juvenile wood and mature wood 幼龄材与成熟材
Juvenile and mature wood 幼龄材与成熟材
The increment of juvenile wood was in direct proportion to the growth rate.
幼龄材生长量与树木生长速率成正比。
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.
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；
Songs from the beginning of the wood softly playing rhythm guitar, into singing, with the expansion of emotion, the problem of juvenile Witt in the looming in Drifting.
歌曲从一开始的木吉他轻声的打节奏，到进唱，随着情绪的扩展，少年维特式的烦恼在若隐若现中飘荡。
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