They serve as a natural fertilizer and help support the roots of future crops. They take in rain and allow it to flow into the soil instead of running off.

个小口子发挥着天然肥料的作用，而且能够帮助支撑之后种下的庄稼的根茎。它们盛纳了雨水并将其导入泥土中，而不是任其白白流走。

With no vegetation and no roots to reinforce them, nothing holds the soils back.

没有植物和根茎的加固，土壤被雨冲走。

18. Put plastic or aluminum foil around the stems of bananas.

18. 用塑料或铝箔纸包裹香蕉的根茎。

Things like root veggies also produce heat.

根茎类蔬菜也会产生热量。

So hidden from our eyes, plant roots are colonized by a fungus called arbuscule mycorrhizae.

藏在我们的眼皮底下，植物的根茎被一种叫做丛枝菌根的真菌定殖。

But potatoes have more protein than these other kinds of roots or tubers.

但是土豆比其他种类的根茎或块茎含有更多的蛋白质。

It's, I think it's a type of a root.

对，我想是一种根茎植物。

They are herbivores, dining on tree bark, grass, fruit, and roots.

它们是草食动物，以树皮、草、水果和根茎为食。

They spend more energy on their leaves, trunks and roots than on their acorns.

比起橡果，它们给予叶子、树干以及根茎的能量会更多。

A seed was still lying down in the bulb under the ground covered with snow.

一颗种子静静地躺在被冰雪覆盖根茎旁。

You see that on that stalk, there's this brown bulbous thing attached.

你看那根茎上，有个棕色球茎状的东西附着。

I'm a root vegetable with a long brown stem.

我是一种根茎蔬菜，有长长的棕色的茎。

It's the season of root vegetables, squashes and coziest recipes as well.

也是根茎类蔬菜、南瓜和最惬意食谱的季节。

Details and photos of those roots are in the journal Science.

些根茎的细节和图片刊登在《科学》期刊上。

So they're very floriferous and there's lots of flowers on one stem.

所以它们非常多花，一根茎上有很多花。

" What sort of roots? " asked Susan.

“什么样的根茎？”苏珊问。

A popular yet unspoken supplement comes from an unlikely root vegetable.

一种很受欢迎却没有说出口的补充剂来自一种不太可能的根茎类蔬菜。

Whiter than fine pearls were the lilies, and their stems were of bright silver.

比上等珍珠还洁白的百合花，它们的根茎是由亮闪闪纠银子做成的。

Instead, the land grew trees that have bark and stems and flowers.

但大地长出的树上却有树皮、根茎和花朵。

In autumn, an " ear" forms at the end of each stem.

秋天, 每一根茎的顶端都会长出一个" 穗子" 。