A pollutant is the dirty stuff itself — smoke, a chemical, tiny bits of plastic — that makes air, water, or soil unsafe. Car exhaust is a pollutant. Waste from a factory poured into a river is a pollutant.

A pollutant污染物 is the dirty stuff itself指的是那個髒東西本身 smoke, a chemical, tiny bits of plastic像是煙、化學物質、或塑膠微粒 that makes air, water, or soil unsafe會讓空氣、水、或土壤變得不安全 Car exhaust is a pollutant汽車廢氣就是一種污染物 Waste from a factory poured into a river工廠排進河裡的廢水 is a pollutant也是一種污染物

The word names the substance, not the mess it leaves behind: the river is polluted; the chemical in it is the pollutant.

The word names the substance這個詞指的是那個物質本身 not the mess it leaves behind而不是它造成的髒亂 the river is polluted河被污染了 the chemical in it is the pollutant河裡的那個化學物質才是 pollutant

Scientists talk about air pollutants and water pollutants, and news uses the word in the same careful way. It is a school-and-news word, not a word for a messy room.

Scientists talk about air pollutants and water pollutants科學家會說空氣污染物和水污染物 and news uses the word in the same careful way新聞也用同樣嚴謹的方式使用這個詞 It is a school-and-news word這是課堂和新聞裡的詞 not a word for a messy room不是用來形容亂七八糟的房間

Though actually, some pollutants you can see, like black smoke, and some you cannot, like gases that still make the air dangerous to breathe.

Though actually不過其實 some pollutants you can see有些污染物看得到 like black smoke像黑煙 and some you cannot有些看不到 like gases that still make the air dangerous to breathe像那些仍會讓空氣變得危險、不能呼吸的氣體