在这些被忽略的公共卫生死角中，可有“他人”的概念？
Is the concept of'others'seen in these neglected corners of public hygiene .
让学生懂得公共区域垃圾遍地，需共同努力清除卫生死角。
Students identify community areas filled with trash and work together to clean those areas .
卫生死角