保持轻松的意思： 给你举个例子： Although the company offered the decorated masks years ago as a way for doctors and nurses to keep a light tone with child patients,the swine flu has brought a surge in sales for the manhattan-based company. 尽管这个公司在几年前就已经开始提供装饰的口罩给医生和护士从而使他们可以和儿童病人保持轻松的关系,猪流感还是给这家位于曼哈顿的公司带来大笔的生意.
