如何保持教室清洁 How to keep classrooms clean

保持教室整洁 Keep the classroom clean ; Keep classrooms neat

保持办公室整洁 Office maintenance

保洁工具室 cleaning instrument room

请保持教室整洁 Please keep the classroom tidy ; Keep classrooms clean ; Please keep classrooms neat

必须保持教室清洁 Classrooms must be kept clean

教室保洁 Classroom cleaning ; The classroom maintains cleanliness

保持教室清洁卫生 Keep classroom clean sanitation ; Keep the classroom clean