Through hard efforts made by many scientific research and design units for several years, or several decades, these technical problems have been basically solved.
这些技术问题历数年、数十年之研究，几经众多科研、设计单位刻苦攻关，于今已基本解决确定下来。
It shows the efforts and the glory of acquiring something through one's hard work, whereas good looks bespeak no struggle of the individual.
它表明通过一个人的努力而获得某种东西的努力和光荣，而不是好的容貌使你不劳而获。
It is time for revenue management to once again work hard to take our efforts to the next level, becoming stronger and growing our expertise by managing through this difficult economy.
现在是时候让收益管理者们再次努力工作，在这困难时期劈荆斩棘，增长我们的专业知识，从而把我们带到另一个境界，让我们变得更强大。
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