ambient level

基本解释

Tight limits were set on disposal into the rivers at only 1.5 degrees above their ambient level.
污水排放入河有严格的标准要求，其污染度只能是周围环境的1.5度。
This demands to monitor and simulate what is ambient level of pollutants in distinct time and place.
这就需要监测和模拟一系列污染物在不同时间和不同空间的环境水平。
Enforcement was possible only when a discharge reduced the quality of the receiving water below the specified ambient level, or to prevent an imminent health hazard.
排放把承接水源的水质降到了环境标准以下，为了防止迫近的健康危险，也可以实行强制性措施。

They can mentor on an ambient level, openly broadcasting their ideas, knowledge and help for mentees or anyone to consider, by sharing their thoughts on micro-blog systems, and they can receive feedback the same way.
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It would even apparently incorporate a noise meter that could automatically trigger various options when the ambient noise hits a certain level.
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Whenever the ambient heat reaches your set comfort level (which can be controlled from the web or a smartphone app), the fan will shut off and the insulating cover -- described to us as ironing board material -- will prevent additional heat from escaping.
ENGADGET