Sent_en: 2zh Nutrient rich pollutants composed mainly of nitrogen and phosphorous come from far away places carried by rivers, and nearby the bay from farm and metropolitan runoff.
Sent_yy: 以氮、磷为主要成分的富营养化污染物来自河流所携带的遥远地方，来自农业和都市径流的海湾附近。