“污渍”的英语？

污渍是用几桶肥皂水和几把硬毛刷除去的。Stains are removed with buckets of soapy water and scrubbing brushes.一块深红色的污渍正在他的衬衫上渗开。A dark red stain was spreading across his shirt.这个方法能清除大多数顽固污渍。This treatment removes the most stubborn stains....