abbr.太平洋半导体公司(Pacific Semiconductor， Incorporated)，部分出货指示器(Partial Shipment Indicator)，目标引导信标系统公司（美国）(Pathfinder Systems Inc.)

The PSI readings have been consistently high this week, indicating poor air quality.
本周的PSI读数一直很高，表明空气质量差。
Singapore's government issues PSI updates hourly during haze season to keep the public informed.
新加坡政府在烟霾季节期间每小时发布一次PSI更新，以保持公众的知情权。
The doctor recommended that I stay indoors when the PSI level is above 100.
医生建议当PSI水平超过100时，我应该待在室内。
Schools in the region may close if the PSI reaches hazardous levels.
如果PSI达到危险水平，该地区的学校可能会关闭。
PSI data is collected from multiple monitoring stations across the country.
PSI数据来自全国各地的多个监测站。
The environmental agency uses PSI as one of the key indicators for air pollution.
环保机构将PSI作为空气污染的关键指标之一。
During the forest fires, the PSI in the affected areas soared to unprecedented levels.
在森林火灾期间，受影响地区的PSI飙升至前所未有的水平。
PSI values below 50 are considered good and pose little or no health risk.
PSI值低于50被认为是良好的，几乎没有健康风险。
The industrial sector has been identified as a major contributor to high PSI levels.
工业部门已被确定为高PSI水平的主要贡献者。
The city has implemented measures to reduce emissions and improve its PSI score.
该市已采取措施减少排放，以提高其PSI评分。
请注意，PSI在这里通常指的是“污染标准指数”(Pollutant Standards Index)，在新加坡和马来西亚等地用来衡量空气质量。但在不同的上下文中，PSI可能有其他含义，例如压力单位“磅力/平方英寸”（pounds per square inch）。上述例句是基于“污染标准指数”的含义。