这些殖民地的植物也需要坚硬有弹性的茎高于土壤，茎可以弯曲很多，但不会断裂，因为水不断闯入他们。

The plants in these colonies also need tough resilient stems above the soil, stems that can bent a lot but not break as water constantly crashes into them.

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很多的茎和根都是辐射对称的。

Many stems and roots show radial symmetry.

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茎的皮层和髓部具很多大型的薄壁细胞。

There are lots of large parenchyma cells in the cortex and pith of the stem.

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芹菜、青菜、大黄茎和其他很多菜看起来就像骨骰。

Celery, Bok Choy, Rhubarb and many more look just like bones.

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不过现在有很多生产商正试图用作物废料和生长速度很快的软茎黍、杨树等非食用作物来制造更为清洁的新一代乙醇燃料。

But companies are racing to make cleaner, next-generation ethanol from sources including crop waste and rapidly growing non-food crops like and poplar trees.

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不过现在有很多生产商正试图用作物废料和生长速度很快的软茎黍、杨树等非食用作物来制造更为清洁的新一代乙醇燃料。

But companies are racing to make cleaner, next-generation ethanol from sources including crop waste and rapidly growing non-food crops like and poplar trees.

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