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

伴生细胞是分散在较大韧皮部细胞中的小细胞。

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

位于喷发点的树上的韧皮部中每千克含有9.5毫克汞。

This had similar mercury levels to the phloem.

树皮的汞含量与韧皮部相近。

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

通过这个空间，延伸出维管束，木质部负责输水，韧皮部负责在光合作输糖。

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

就在韧皮的边是树的另外一种组织叫木质。

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

汞通过韧皮部被转到树皮中，有选择性地在其中沉积，而非在自己不易更新的部位沉积。

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

碳通过韧皮部传到树枝，沿着树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：木质部和韧皮部。

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

第二组通道叫韧皮部，就长在树皮之下，它将光合作的产物输送到树的根部。

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韧皮部细胞依偎在一起，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，实际上超过 1000 升的水，自由流动于韧皮部和木质部的管道中。

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，韧皮树液变成很稀，类似水一样的物质，聚集在树的底部。

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

韧皮部边是树的另一种组织类型：木质部。

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

木质部和韧皮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。

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.

包含树叶光合作产生的糖分，韧皮树液很稠，像蜂蜜，沿着植物的韧皮组织向下流动把糖份送到树的各个部分。

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，木质部又被一圈韧皮部… … 韧皮部包围，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，韧皮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.

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

The xylem cells, which are moving water and nutrients up through the stem, are clumped toward the inside of the bundle, and the phloem, which is transporting sugars down through the plant, is clustered toward the outside.

木质部细胞负责将水分和营养物质通过茎部向上输送，它们向束的内部聚集，韧皮部负责将糖分向下输送，它们向束的外部聚集。

The ability to perceive the world through the eyes and ears of other beings, through the phloem and xylem of trees, even reconnects us, humans, to the fantasticand richly diverse network of organisms that make up our shared Earth.

通过其他生物的眼睛和耳朵、树木的韧皮部和木质部来感知世界的能力，甚至将我们类与构成我们共同地球的奇妙而丰富多样的生物体网络重新连接起来。