It has set permissible noise levels for building tools and vehicles.

它已经为建筑工具和车辆设定了允许的噪音水平。

Scientists have detected some elevated levels of radiation in the area but they do say that they are not above permissible levels.

他们检测到这个地区所受的一些辐射程度要高于其他地区，但又明确表示辐射程度并未超过允许数值。

They found that the average participant in the study gained at sound levels that often nearly surpassed were outright exceeded what is considered a permissible level.

他们发现，参与研究人员接触的平均声级几乎超过甚至完全超出人体可接受的听力声级范围。