The road of history is not level and smooth all along. Sometimes the path will come to a dangerous and difficult place.

历史的道路，不总是平坦的，有时会变得艰难险阻。

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A child who has just learnt to walk can fall down even on level and smooth ground.

刚刚会走路的小孩子在平正的地面上仍会跌跤。

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Construction acceptance: surface shall be level and smooth, of unified hue, no clear color deviation.

施工验收：表面平整光洁、色彩一致、无明显色差。

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When the discussion turns to nominal targeting, we can say Nominal Gross Domestic Income Level Targeting (NGDILT) ensures that total Wages and Profits grow at smooth steady rate.

FORBES: Dan Mitchell Wants to Ditch Keynesian-Laced GDP -- He's Right

And so we're trying to find this balanced approach in which we have a smooth glide path from 10 percent down to a more sustainable level, and I think that's what's reflected in this budget.

WHITEHOUSE: Detailing the FY2011 Budget