The research on the ecological water requirement is still at the initial stage, and its connotation has not yet been nailed down.

生态环境需水量的研究还处于起步阶段，对于其内涵尚无统一的界定。

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When evaluated ecological water utilization level, industrial, agricultural and living water utilization and nature water utilization should be included.

在进行用水水平评价时，应该考虑工业用水、农业用水、生活用水和人类赖以生存的自然环境用水。

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An ancestral species might have adapted to exploit a particular ecological niche on one island and then traveled over water to colonize other islands.

一个原始物种可能已经适应了利用一个岛屿上特定的生态位，然后在水上迁徙到其他岛屿定居。

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Economic activities depend on access to ecological resources including water, biomass and fossil fuels.

UNESCO: Resource limits and their implications for economic policy | United Nations Educational, Scientific and Cultural Organization

So it makes no sense for politicians to allocate great swathes to golf courses, especially given ecological concerns -- primarily over water use -- that accompany their operational capacity and the association with the wealthy elite.

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This is where recognition of the fundamental ecological functions of wetlands as regulators of water regimes comes into its own.

UNESCO: MEDIA SERVICES