Once there was a real distinction in clothing between blue-collar workers and white-collar workers
问题描述：
Once there was a real distinction in clothing between blue-collar workers and white-collar workers
答
过去， 蓝领工人和白领工人穿的衣服真的不同。
答
从前有一个真正的区别在衣服的蓝领工人和白领工人之间
答
蓝领和白领之间真的存在差别
答
曾经，蓝领工人和白领工人的衣服确实有很大差别。
答
过去在蓝领工人和白领工人两者之间衣服上是确实有区别的