幼期的瘤状体基部表面1—10层细胞内含菌丝，长大的瘤状体形成周皮，内部形成大量维管束和髓；
There was hypha in 1- 10layers cell of surface in young tumour-body base. Grown tumour-body formed periderm, vascular bundle and a lot of pith cells.
它们耐心地在水面下照顾幼鲸，等待哺乳期的母鲸回来。
They patiently take care of the young whales just under the surface of the water, waiting for the feeding mothers to return.
幼期神经细胞的神经元突触在能够最大程度上释放神经传递素以前必须先发育成熟。
The synapses of young nerve cells must mature before they can release their neurotransmitters to the full extent.
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