Thus secondary metabolic products play a very important role in the life history of plant populations.

次生代谢产物在植物种群的生活史中发挥着重要作用。

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During the history of plant breeding there has been a desire to increase the choice of genes (the gene pool) available FOR crop improvement.

在植物育种的历史中，人们一直希望增加对可用于植物改良的基因(基因库)的选择机会。

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Plant communities assemble themselves flexibly, and their particular structure depends on the specific history of the area.

植物群落可以自由地聚集，并且，它们的特殊结构由该区域的具体历史情况所决定。

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All these images and many more are to be found in Margaret Plant's thoroughly and lovingly researched, thoughtful and hugely compendious history of modern Venice.

ECONOMIST: Venice

Dr John Morgan, head of the Forestry Commission's plant health service, said the work would help shed light on "the history and nature of the introduction of new pests like Chalara, and in helping to understand how we tackle the disease that's arrived and to understand what the risk of spreading is".

BBC: Ash fungus genetic data released

One of the fires, at a Karachi textile plant, ranked among the deadliest industrial factory fires in history, surpassing Thailand's Kader Toy fire, which killed almost 200 more than 20 years ago.

WSJ: Apparel Retailers Confront Tough Options