Vegetation patterns changed when goats were introduced to the island.

自从引进山羊之后，这个岛上的植被模式改变了。

《牛津词典》

In study for vegetation distribution and regionalization, NPP index can be introduced as an effective tool by which somerelevant regulations may be elucidated simply and directly.

在研究植被分布和分区时引入NPP指标可以更简捷地阐明有关规律。

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Spectral reflectance characteristic of vegetation was introduced. The advantage and disadvantage of several vegetation indexes in common use were summarized.

介绍了植被的光谱特征，概述了几种常见的植被指数及其优缺点。

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