source unit

例句：

1. 1. The company'ssource unit is located in the city center.
   该公司的源单位位于市中心。
2. 2. The researchteam found that the source unit was contaminated with heavy metals.
   研究团队发现，该源单位被重金属污染。
3. 3.The source unit is responsible for monitoring waterquality in the area.
   该源单位负责监测该地区的水质。