Interfascicular cambium A single layer of actively dividing cells between the vascular bundles in stems.
束间是位于茎的维管束间的具有旺盛裂能力的一细胞。
Acropetal differentiation of the cambium layer continues as the primary root elongates.
的顶初生根伸长一样在继续进行。
In roots it may also be called plerome.
原在根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，最早由原。
Bark The outermost tissue of the stem and roots in woody plants, on the outside of the phellogen (cork cambium).
木本植物中的茎或根中木栓外方的全部组织，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.
而形成层则生成和木质细胞。
Right, and as the cambium is creating more xylem cells, they're going on the outside of the heartwood.
的， 随着形成层不断产生更多的木质细胞，些细胞会分布在心材的外。
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，然后它，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.
然，心材会得更老，而易见的， 因为你了解通过年轮来判断一棵树的年龄，就我们之前讨论过的那些内年轮，即木质。 对吧，当形成层不断生成更多的木质细胞时， 它们会位于心材的外。
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.
因此沉积物被运输然后沉积下来，随着时间的推移在地球表面形成层。我们检查些层以了解不同的地质时期，包括它们开始和结束的时间。
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划词翻译
详细解释
是位于茎的维管束间的具有旺盛
裂能力的一
顶
初生根伸长一样在继续进行。
同一种东西吗？
和木质
些细胞会分布在心材的外
然，心材会
