一年生和多年生植物基本没什么增长了，可食用植物则上大有可为，需求日益增长表明其效益可观。

With annuals and perennials suffering from little to no growth, the edible category presents many opportunities for sales growth and is a highly profitable sector with increasing demand.

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典型的古代的河流只是宽阔的、像平板一样的水流。 《地质学》和《地球科学评论》上的一项最新研究说我们应该感谢最初的那些陆生植物，它们使河流变得弯曲了。

They say that well before dinosaurs or, really, much of anything roamed the Earth, rivers were just vast expanses of water heeding only gravity and heading straight to sea.

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实际上，这是象谷物一样的一年生植物。

This is an annual, which to all intents and purposes behaves like a cereal.

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