Some environmental groups feel that even physically harmless tests could represent the first step onto a slippery slope that would ultimately lead to full scale deployment of these technologies.

一些环保团体认为，即使是一项本质上无害的试验，也有可能标志着滑向危险的第一步，根据滑坡理论，有了这第一步，就完全有可能最终导致全面大规模地应用这些技术。

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Soil erosion forecasting model can be divided into three levels of slope, small watershed and region in spatial scale.

土壤侵蚀预报模型在空间尺度上可以划分为坡面、小流域和区域三个层次。

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Inspired by the undulation of nearby mountains, the continuous slope roofs diminish the building scale and gain a series of massing and spacial variation.

连续折面坡屋顶的形式，进一步减小了建筑的尺度，形成统一而又富有韵味的形体和空间变化，并与自然山体轮廓相呼应。

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After the pipeline was shut down, Alyeska ordered all North Slope producers to scale back production to 5% of normal levels.

WSJ: BP to Cut Oil Production on Alaska's North Slope

Without a sense of scale, every slope was magnified and stream rivulets resembled gorges.

BBC: The quietest place in the US