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。

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This level is also a safety limit to avoid health harm of environmental noise.

最高允许值也是为避免环境噪声对人的健康危害而定的一个安全界限。

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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。

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But the Consumer Product Safety Commission has just lowered the limit to ninety parts per million.

VOA: special.2009.08.31

As of 14:00 local time (05:00 GMT) on Friday, the temperature of water inside the cooling pool at reactor 3 was 15.1C, well below the safety limit of 65C, Tepco said.

BBC: Fukushima nuclear plant: Cooling system power restored

The plant's operator Tokyo Electric Power Co (Tepco) said exposure to radiation levels in the No 3 reactor for four-and-a-half hours would exceed the emergency safety limit for power plant workers.

BBC: Robots record high radiation levels at Japan reactors

Mothers of young children have been particularly aggressive about prodding the government to increase food testing, and to re-evaluate the safety limit and impose more restrictions, such as a ceiling on radiation measurements in school lunches.

WSJ: Radioactive Traces Found in Japan Baby Formula