对社交网站来说，斜坡很容易就可以变成陡坡甚至悬崖。
And in the social networking business, a downward slope can very quickly become a steep slope or even a cliff.
水星表面上杂乱地分布着坑洞、平原和巨大的悬崖般的陡坡，陡坡可长达数百公里。
The surface is a jumble of craters, plains and immense, cliff-like scarps that can be hundreds of kilometres long.
若要到达山顶，你必须穿越山谷，爬上陡坡，毫不畏惧危险的悬崖。
If you would attain to the mountain-top you must pass through the valley, climb the steeps, unafraid of the dangerous precipices.
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