doping of gasoline

例句：

1. 1. The athletes were bannedfrom the competition for doping.
   运动员因使用兴奋剂而被禁止参加比赛。
2. 2. The manufacturer was found to have adulterated the product with synthetic ingredients.
   制造商被发现用合成成分掺杂了产品。
3. 3. The companyhas been accused of adulterating itsfood products with artificial flavors and colors.
   该公司被指控在其食品产品中掺杂人工香料和色素。