The companion cells are the little guys scattered throughout the larger phloem cells.

伴生细胞分散在较大部细胞中的小细胞。

This had similar mercury levels to the phloem.

的含量与部相近。

Right beside the phloem is the tree's other tissue type: the xylem.

就在的旁的另外一种组织叫木质。

Phloem from the tree at the eruption site had 9.5 micrograms of the metal per kilogram.

位于喷发点的上的部中每千克含有9.5毫克。

The two more distant trees had 2.9 and 2.0 respectively.

另外两棵较远的的部每千克含量分别为2.9及2.0。

Through that space stretches the vascular bundle, with xylem to transport water and phloem which transport sugars after photosynthesis.

通这个空间，延伸出维管束，木质部负责运输水，部负责在光合作用后运输糖。

Carbon travels through the phloem into the branches, down the tree trunk and even all the way down to the soil.

碳通部传到枝，沿着干甚至一路传到土壤中。

And there are two main types of cells that make up that vascular tissue: xylem and phloem.

构成维管组织的细胞主要有两种：木质部和部。

Phloem cells, on the other hand, transport stuff mostly in the opposite direction as xylem cells.

另一方面，部细胞与木质部细胞的运输方向相反。

Mercury is carried there by the phloem and selectively deposited in it, rather than in the plants' more permanent parts.

通部被转运到中，有选择性地在其中沉积，而非在自己不易更新的部位沉积。

Right beside the phloem is the tree’s other tissue type: the xylem.

部旁的另一种组织类型：木质部。

A second set of channels, the phloem, found just under a tree's bark, carries the products of photosynthesis to the roots.

第二组通道叫部，就长在之下，它将光合作用的产物输送到的根部。

By the end of its journey, the phloem sap has thinned into a watery substance, pooling at the base of the tree.

这个旅程的最后，液变成很稀，类似水一样的物质，聚集在的底部。

And if we zoom in, we'll notice its xylem and phloem cells snuggled together, just like they were in the stem.

如果我们放大，我们会注意到它的木质部和部细胞依偎在一起，就像它们在茎中一样。

Carbon and water, more than 1,000 liters of water, in fact, flow freely through the phloem and xylem tubes carry it along.

碳和水，实际上超 1000 升的水，自由流动于部和木质部的管道中。

Containing the sugars generated in leaves during photosynthesis, phloem sap is thick, like honey, and flows down the plant's phloem tissue to distribute sugar throughout the tree.

包含叶光合作用产生的糖分，液很稠，像蜂蜜，沿着植物的组织向下流动把糖份送到的各个部分。

Xylem and phloem are bundled together to form the veins of a plant — the subway map that connects the leaves, stem, and roots.

木质部和部捆绑在一起形成植物的脉络——连接叶子、茎和根的地铁地图。

The pith is encircled by a ring of xylem, and xylem is encircled by a ring of phloem… phloem, and pith growth is usually pale in color.

髓被一圈木质部包围，木质部又被一圈部… … 部包围，髓生长通常呈浅色。

So the xylem cells are transporting nutrients from the roots to the leaf, and the phloem are taking the freshly made sugar from the leaf to the rest of the plant.

所以木质部细胞将营养物质从根输送到叶，部将新鲜的糖从叶输送到植物的其他部分。

Here at the tree's base, there are more of these particles in one tissue than the other, so the water from the phloem sap is absorbed into the xylem to correct the balance.

在的根部，这些组织里的微粒分布不均匀，因此，液中的水分被吸收到木质中，来调节平衡。