This Recommendation provides guidance on the use of gas discharge tubes to limit overvoltages on telecommunications lines.

本建议给出了用于限制电信线路过电压的气体放电管的导则。

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The Canadian Cancer Society says the daily upper safety limit is 2,000 units, and that their recommendation of 1,000 IU takes into account vitamin D from diet and other sources.

加拿大癌症协会说每日维生素D服用量的安全上限为2000IU，他们之所以推荐每日服用1000IU维生素D是考虑到饮食和其它一些维生素D的来源。

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Wahl also doubted FIFA would implement the ICG recommendation to limit the terms of FIFA president and executive committee members to two terms of four years.

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