Interfascicular cambium A single layer of actively dividing cells between the vascular bundles in stems.
间形成是位于茎的间的具有旺盛分裂能力的一细胞。
Acropetal differentiation of the cambium layer continues as the primary root elongates.
形成的顶分化像初生伸长一样继续进行。
In roots it may also be called plerome.
原形成中也被可称为中柱原。
Protoxylem The PRIMARY XYLEM elements that are formed from the procambium first.
初生木质部的成分，最早由原形成形成。
Bark The outermost tissue of the stem and roots in woody plants, on the outside of the phellogen (cork cambium).
木本植物中的茎或中木栓形成外方的全部组织，称为树皮。
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Is cambium and pith the same thing?
形成层和髓同一种东西吗？
And the cambium produces phloem and xylem cells.
而形成层则生成韧皮部和木质部细胞。
Right, and as the cambium is creating more xylem cells, they're going on the outside of the heartwood.
， 着形成层不断产生更多木质部细胞，这些细胞会分布在材外部。
It killed a little bit of the cambium and then it, the tree survived and kept growing and it starts to curl around that scar.
它破坏了一点形成层，后它，树幸存下来并继续生长，它开始在伤疤周围卷曲。
Your heartwood is gonna be older, obviously, because you know how you can tell a tree by the rings, those inner rings that we talked about, the xylem.
，材会得更老，这而易见， 因为你了解通过年轮来判断一棵树年龄，就我们之前讨论过那些内部年轮，即木质部。 对吧，当形成层不断生成更多木质部细胞时， 它们会位于材外部。
So sediment is transported and then deposited and it forms layers on the Earth ’ s surface over time. We examine these layers to learn about different geologic time periods including when they began and ended.
因此沉积物被运输后沉积下来，着时间推移在地球表面形成层。我们检查这些层以了解不同地质时期，包括它们开始和结束时间。
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划词翻译
详细解释
间形成
是位于茎的
顶分化像初生
伸长一样
继续进行。
同一种东西吗？
， 
着
材
后它，树幸存下来并继续生长，它开始在伤疤周围卷曲。
，
