The upper limit of safety, the institute said, is 2,000 milligrams a day for men and women over 51.

对51岁以上的男性和女性而言，安全摄入量的上限为每人每日2000毫克。

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Medical equipment is moving along the direction of portable type and low power. As to ultrasonic diagnose equipment, the emission voltage arrives to the limit of safety standards.

对于超声诊断设备而言，发射电压峰值功率已经达到安全极限，在不降低成像质量情况下降低仪器发射电压十分有必要。

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But it has managed to limit both the rise in unemployment and the suffering of the most vulnerable; the social safety net has survived intact, as has the basic decency of its society.

然而，冰岛成功地抑制了失业率的上升，限制了最容易受到威胁的人群所遭受的痛苦；社会安全保障体系完好无损，冰岛社会最基本的尊严也没有受到损害。

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Birol and the IEA said that a phase-out would avoid 750m tonnes of CO2 a year by 2015, potentially rising to 2.6 gigatonnes by 2035, a level sufficient to provide half the emissions reductions needed to limit global warming to 2C, considered the limit of safety by many scientists.

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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

After delivering a verdict of accidental death, Mr Needham recommended that the government "re-visit the issue of the imposition of a national speed limit in the interests of protecting the safety of its road users".

BBC: Isle of Man speed limit absence 'puts lives at risk'