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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Among other things, this allows it to learn tasks by having a human trainer physically guide its articulated arm through a specific activity.

除其他事项外，这允许它由具有人教练物理通过特定的活动引导其关节臂学习任务。

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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