These compounds, which include vitamins a, c, and e, selenium, beta carotene, and folate, fight free radicals, unstable compounds thought to damage cells and contribute to aging.

这些包括维生素a、C、E和硒、胡萝卜素、叶酸在内的混合物是抗自由基的，人们认为不稳定的自由基会伤害细胞并且导致人衰老。

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Join professional and community organizations, take or teach a class, give a lecture, start a blog or contribute to an e-newsletter.

加入专业群体和社区组织，可以去授课或做讲座，写写博客或电子通讯。

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If you find these in error or would like to contribute to this list, please send me an E-mail.

如果您发现这些设置中有错误，并且希望对这个清单贡献自己的力量，请给我发e - mail。

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Campaigns have no problem spamming constituents, and they want to make it as easy as possible for voters to contribute, say, by encouraging those on their e-mail lists to download a mobile app.

FORBES: Magazine Article

Minority managers have told us they have been instructed to contribute substantially, i.e.

FORBES: The Politics of Minority or Emerging Manager Programs (August 2, 2004 )

She was responsible for influencing best practices in e-lawyering, winning a prestigious award for innovation, and she continues to contribute to the profession through authorship ( Virtual Law Practice: How to Deliver Legal Services Online) and education on the subject of virtual law office technology helping countless others learn how to create virtual practices.

FORBES: Women Lawyers Without Borders Rock Legal Practice