今天我们要学的词是 adulterate.

adulterate 的意思是掺杂，掺假。 Many drug dealers in the U.S. have started to adulterate heroin with fentanyl, not recognizing that fentanyl is 50 to 80 times more powerful than heroin. 美国的许多毒品贩已经开始在海洛因中掺入芬太尼作假，但没有意识到芬太尼的强度比海洛因大50到80倍。

adulterate 的形容词形式 adulterated，就是掺假的。A recent surge of incidences of adulterated products has forced U.S. Food and Drug Administration to tighten drug-safety regulations. 最近掺假药品的事件激增，迫使美国食品和药物管理局实施更严格的药物安全法规。