An early study suggested that harvests contained levels of radiation well under the safety limit for human consumption.
早期的研究表明，收割的作物所含辐射量远低于供人类安全食用的限制水平。
They say the feed consumed by the animals measured up to 500 times the national safety limit for radioactive cesium.
他们指出，这些饲养用的草料中放射性铯的含量，超过国家规定放射性铯的安全限量五百倍以上。
Objective To discuss the safety limit of portal vein embolization, to evaluate the feasibility and efficacy of Bletilla microsphere used as an embolic agent for portal vein.
目的探讨门静脉栓塞的安全范围及白芨微球作为门静脉栓塞剂的可行性与有效性。
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。
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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