在主战坦克以及各类轻、中型履带式及轮式装甲战斗车辆的研发和建造方面，这个国家在过去的15年里进展神速。

Over the last 15 years the country has made rapid progress in the design, development and production of AFVs ranging from MBTs through to light and medium tracked and wheeled vehicles.

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看来是这些玛雅金字塔的建造者，可能认为必须掩盖掉这些壁画—“你们不能停止工程的进展”——然而壁画的制作者们仍然明显地不愿意破坏掉这些特殊的艺术品。

The Mayan builders may have had to cover the murals—you can’t stop progress—but they were apparently still reluctant to destroy such exceptional artwork.

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让私人出资建造新核电站的计划也进展缓慢。

Plans for private investors to build new power plants are way behind schedule.

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