substance

(N) 物質;東西 【例句】 People dirty the air with gases and smoke, poison the water with chemicals and other substances, and damage the soil with too many fertilizers and pesticides. 人們使氣體與煙、霧弄髒空氣，以化學品或其它物質毒化水，以及以過多的肥料和殺蟲劑糟蹋土壤。