The converse is true as well; in the face of vague or overwhelming goals, it's difficult for most of us to maintain our motivation and assess our progress.
反之亦然；面对着模糊或是遥不可及的目标，我们中大多数人都很难保持动力，也很难评定自己取得的进步。
The technical progress is an important motivation for the continuous increasing economic growth in either a country or a region.
技术进步是推动一个国家或地区经济持续增长的重要动力。
Progress on a goal provides the motivation for another step forward.
离目标越来越近会为你不断向前提供动力。
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