People in the middle of a social network could be privy to useful gossip, such as the location of food or good investment choices.

处于社交圈中的人们可能会参与一些有用信息的传播，比如哪些地方有吃的，或者好的投资选择等等。

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This definition doesn't reveal the thought, clarity, detail, and time investment required to produce a useful business process.

这个定义并不能反映出产生一个有用的业务流程所需的思考、明确性、细节和付出的时间。

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Only could the valuation based scientific and detailed value analysis produce compellent valuation results, which is useful for investment decisions.

科学而详尽的股权价值分析才是得出令人信服的评估结果，从而为投资决策提供依据的最好方法。

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The problem is that Beijing has implemented several regulations during the past decade that have effectively cut off the economy from this useful source of investment capital.

WSJ: Scott A. Jalowayski: A Private-Equity Boost for China

If they are not allowed to share any confidential information, how useful are analysts to investment banks?

ECONOMIST: Investment research: The information gap | The

Infrastructure improvements will be useful, but the best investment will probably be to help the developing world get wealthier.

ECONOMIST: Blowing hot and cold