gān xǐ diàn / shǐ yòng / sì lǜ yǐ xī / lái / qù chú / yī wù / shàng / de / yóu zì干洗店使用四氯乙烯来去除衣物上的油渍。Dry cleaners use tetrachloroethylene to remove oil stains from clothes.