chemical pollutant的用法和樣例：
例句
- Chemical pollutants released into water or spread through the air are often invisible to the human eye.
釋放到水體中或空氣傳播的化學污染物，通常是不可見的。 - However, it is possible that chemical contaminants, pesticides and hormones in the beef could be the reason for these results.
但是，化學污染物，殺蟲劑及牛肉種的激素都有可能是導致精子數量減少的原因。
