PM10 is an important indicator of urban air pollution, and the health risks associated with the complex mixtures of pollutants typically found in cities.

PM 10是城市空气污染以及在城市中通常发现的与污染物的复杂混合物相关健康风险的一项重要指标。

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At present, Indoor Air Pollution has become the social hot spot. Total Volatile Organic Compounds (TVOC) is an important indicator of Indoor Air Quality (IAQ).

当前，室内空气污染已成为社会关注的热点问题，总挥发性有机物(TVOC)是室内空气质量(IAQ)的重要指示指标。

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Inside is arranged ammeter, voltmeter, air circuit breaker, indicator, ac contactor, conversion switch, and buttons for starting or stopping.

柜内还装有电流表、电压表、自动空气开关、指示灯、交流接触器、工频变频转换开关及起动、停止按钮等。

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Officials said the plane suffered more damage than originally thought in the collision, including the propeller damage, and the loss of wing flaps and the air speed indicator.

CNN: U.S. pilot struggled to regain control after collision

When the Ram reaches highway speeds, the air suspension settles into its low highway stance (you get a little chime and indicator to tell you so).

WSJ: 2013 Ram Laramie Longhorn Review: A Truck That Jingle Jangle Jingles