The level of differentiation of the primary tissue located where below the elongation region.
甜菜根的初生组织在伸长区下方已开始逐渐分化。
Mankind appropriates about a quarter of what is known as the net primary production of the Earth (this is the plant tissue created by photosynthesis)—a lot, but hardly near the point of exhaustion.
人类仅利用了地球大约四分之一净初级生产资源（这是由植物组织光合作用所产生的）。 虽然这已经很多，但是还没有达到用尽的地步。
He speculates that its primary driver may be overweight and obesity, because estrogen is sequestered in fat tissue.
他推断，青春期提前的主要原因可能是身体超重和肥胖，因为雌性激素可以隐藏在脂肪组织中。
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