ambient level

Ambient level of NH3 in Beijing was measured with the system.

使用该系统对北京地区大气的NH3进行了连续观测，并对测量结果进行了分析。

A digital camera includes a photoflash lamp, an ambient light sensor generating a signal representative of an ambient light level proximate the digital camera, and a photoflash controller.

本实用新型公开了一种数码相机，该数码相机包括一个闪光灯，一个发出表示接近数码相机环境光亮度的信号的环境光传感器，和一个闪光灯控制器。

Such parameters as ambient oxidizer concentration, temperature level, and fuel identity are held constant.

周围氧化剂浓度 、 温度量级 、 燃料性质参数是保持恒定的.

Audiometric Ambient Noise Evaluated by Using A& Weighted Sound Level

用A&计权声级评价测听环境噪声

Using the health risk assessment model of chemical carcinogens and non-carcinogens and combing with the maximum acceptable risk level recommended by relative agencies and authors, the paper develops the risk assessment of carcinogenic and non-carcinogenic PTS in different ambient medium of Shanghai.

采用化学致癌物与非致癌物的健康风险评价模型，结合有关机构和作者推荐的最大可接受风险水平，对上海市多介质环境下的致癌类与非致癌类PTS进行定量化的风险评估。