The nearest observation point is 200 metres from the sarcophagus, and offers a good view of the epicenter of the accident without exposing visitors to "excessive" levels of radiation.

最近的观察点是在200米以外的一个石室上，能很清楚地看到事故发生的中心，而不会让游客暴露在过高的辐射中。

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The devices sound an alarm when they detect excessive radiation and when the dose exceeds a specified level over time.

当检测到过量的辐射超过一定时间时，机器就会自动报警。

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Excessive exposure to UV radiation caused the loss of approximately 1.5 million DALYs (disability-adjusted life years) and 60 000 premature deaths in the year 2000.

2000年由于过度暴露于紫外线辐射约丧失150万残疾调整生命年，并造成6万例过早死亡。

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"We can spare patients from the cost and excessive radiation from follow-up CT scans, " Hudis said.

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In terms of infrared radiation exposure (excessive amounts of which can cause cataracts), getting zapped by one of these scanners is the equivalent of having a video camera pointed at you--or reading by a 40-watt lightbulb.

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Excessive attention has been directed to hypothetical radiation dangers relative to the enormous scale of broader havoc wrought by those incredible once-in-three-century natural disasters.

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