A second interesting observation is how important the initial user base can be for the success of a company dependent on viral marketing.

第二个有趣的观察是，对于依靠病毒营销取得成功的公司来讲，第一批的用户基础是多么的重要。

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A year on, tourists cluster at its base to take photos or to visit the observation deck; inside, many of the flats lie empty.

一年之后，游客们或簇拥在大楼底层留影，或在观景台上参观；而在大楼内部，许多公寓仍然空置。

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To predict earthquake by using data is a new probe of geochemistry methods, so this work provides real observation base for its deepgoing study.

由于用气氡资料预报地震是地球化学方法的一个新探索，因而本项工作为其深入研究提供了一定的实际观测基础。

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We can do that by intercepting our observation with the date base and knowledge we required, the whole color map.

通过截取我的观察结果,分析数据库，所需的知识，以及整个彩色图画。

斯坦福公开课 - 7个颠覆你思想的演讲课程节选

Is that observation fair, that he has a narrow base among the supporters of Moqtada al-Sadr?

NPR: Hadley's Memo on Maliki Reveals U.S. Analysis