Flavonoid is widely researched in nature product exploitation because of its specific activity to human body.

黄酮类成分因其具有多样生物活性成为目前天然产物研究的热点。

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Applying a small current to specific parts of the brain can increase its activity, making learning easier.

用较小的电流刺激大脑的特定部位，可使该部位加倍活跃，深造更轻松。

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The finance is the activity of capital investment and income shares and its specific economic interest relation at the process of business operation.

财务是指企业生产经营过程中资金的投入与收益活动及其所形成的特定的经济利益关系。

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By bringing together like-minded individuals who support a business, enjoy a specific entertainer or are passionate about a specific cause, online communities can reach a significant level of activity and connectivity, which then encourages its members to spend more time on the site, visit more regularly and interact more with others there.

FORBES: Social Media: Evolving From Broadcasting To Conversation