Its wood juvenile period is about 8～9 years old.
枫杨木材幼龄期为 8～ 9年。
参考来源 - 枫杨生长规律、材性变异及其纸浆用材适用性评价·2,447,543篇论文数据，部分数据来源于NoteExpress
不过，动物真的会利用它们的大脑袋和漫长的幼龄期来学习吗？
But do animals actually use their big brains and long childhoods to learn?
谷氨酰胺作为一种条件性必需氨基酸，在动物处于特殊生长阶段如幼龄期或在应激期间都显示出明显的免疫促进作用。
As an important conditionally indispensable amino acid, glutamine presents an important role in promoting immune function when the animal has been in earlier age or during stress.
对等密度107杨幼龄林进行一次性施肥灌溉措施对比试验，结果表明，一次性水肥措施对其幼林未郁闭前各龄期胸径生长量和郁闭度均有促进作用。
Comparative experiments was conducted on the effect of one-time irrigation and fertilization on the DBH and crown density of young 107 poplar plantations of even planting density.
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