The index gives an indication of the level of air pollution which is present in the outdoor environment . the general api reflects the level of air pollution which most people in hong kong are exposed to most of the time 空气污染指数显示室外的空气污染水平，一般空气污染指数代表了我们大部份时间所接触的空气污染情况，而路边空气污染指数则提供繁忙街道旁的污染水平。
The results showed that both of water enverionment and biotic enverionment were good , and surface sediment enverionment was polluted in middle level besides that of some stations were seriously polluted , in which c ( subscript d ) plaied a main role in pollution 结果表明，水质环境和生物环境处于良好水平；表层沉积环境处于污染水平，有的站达到严重污染水平，其中重金属锡的贡献率最大。
The order of four soil biochemical intensity being sensitive to heavy metal pollution indicated as : nitrification > nitrogen fixation > decomposition of cellulose > ammonification . however , soil microbial biomass c : n ratio increased with the increasing of heavy metals level 几种生化作用强度的下降顺序为硝化作用固氮作用纤维素分解强度氨化作用；但土壤微生物生物量碳氮比则随着重金属污染水平的升高而增加。
Installed a telemetry and monitoring system with online computerised network supplying information to epd for monitoring the pollution level to make sure that it is operating within the statutory limit . monitoring systems with temperature recorders are installed in major crematoria 在联机电脑网络上安装遥测监测系统，向环境保护署提供资料，以便该署监察污染水平，确保火化场运作时没有超逾法定标准；而各大火葬场亦装设附有温度记录仪的监测系统；
These grades were further boosted by the recent upgrading of the sha tin and tai po sewage treatment works , which meant that the exported treated sewage flowing through the kai tak nullah was cleaner than ever before . egrets have now returned to the nullah , which is teeming with fish once again 由于近年来沙田及大埔污水处理厂进行改良设施后，处理过的污水达到前所未有的低污染水平，启德明渠的水质等级更进一步改进，使明渠内再有鱼类栖息，鹭鸟重临。
If you are exposed to low to medium levels of air pollution , there is no general concern . for high level of pollution , there is no immediate concern but long - term effects are possible with persistent exposure . very high and severe pollution levels can mildly or significantly aggravate the symptoms to people with heart or reparatory illness 若空气污染水平属轻微至中等，表示对一般公众没有影响；若空气污染水平属偏高，表示虽然对一般公众没有即时影响，但长年持续暴露亦可对健康造成长远影响；若出现甚高或严重空气污染水平，可能会轻微或严重加剧患有心脏病或呼吸系统疾病人士的病徵。
Air quality assessment 6 . 1 the assessment has considered regional air quality impacts resulting from the changes in road traffic emissions after implementation of the crosslinks project . the assessment has predicted levels of nitrogen dioxide , ozone and respirable suspended particulates and compared these with existing pollution levels and air quality objectives 1本研究已评估在新跨界道路工程计划展开后，道路交通废气排放的转变对区域空气质素所带来的影响，并预测二氧化氮、臭氧和可吸入悬浮粒子的浓度，然后与现时空气污染水平和空气质素指标作一比较。
Laboratory culture experiment with the same treatments as pot experiment but without plant was carried out synchronously under constant temperature ( 25 ? ? ) and 20 % soil moisture . to study the influence of inhibitors on the dynamic process of transformation and variation of availability of cd in soil , laboratory cultured soil was sampled in certain interval during the 128 - day cultured period for the analysis of cd availability and speciation . in adsorption - desorption experiment , the tested soil had fistly been cultured under constant temperature ( 25 1 ) and 20 % soil moisture for two months after the treatment according to the designed plan , then isothermal adsorption - desorption experiment was proceeded when the reaction between inhibitor and soil tended to be stable 石灰施用量对植株吸收锅有显著影响，植株各部位锅含量k ）与石灰添加量… ， ）的关系可以很好地用方程y叫（ ax斗bx化）描述，石灰对植株锅累积的调控存在一个最佳抑制效应剂量，低于或高于这一剂量均不能达到最佳抑制效果，但对于不同植株部位和不同污染水平，最佳抑制效应剂量不同；低用量下，单位石灰添加量对植株吸收锅的抑制作用比高用量时大，因此若综合考虑调控剂的施用成本及其对生物量的影响效应，则在本试验条件下以施用石灰0
