保持清洁

• Yes , they can keep oil and water apart and keep the discharged water clean
  是的。它们可以使油水分开，从而使排放的水保持清洁。
• Keeping the workplace clean and ensuring that it is adequately lit and ventilated
  工作地点须保持清洁、充足的照明及空气流通；
• Keep home environment , kitchen and utensil clean to avoid attracting flies and cockroaches
  家居厨房食具要保持清洁，免生苍蝇。
• Always keep your hands clean . wash hands after touching public objects or facilities
  双手应经常保持清洁，接触公用物件或设施后应洗手。
• What name would you like on your barrel ? please keep it clean . 25 character maximum
  你在你的酒桶上起啥名字？请保持清洁。最多25个字母。
• Always keep your hands clean . wash hands after touching public objects or facilities
  双手应经常保持清洁，接触公用物件或设施后应洗手。
• They can be ruined by scratches . keep them clean particularly when riding at night
  护目镜和头盔面罩必须保持清洁，在夜间驾驶时，这点尤其重要。
• The fish tank area should be clean , well ventilated and free from any building defect
  鱼缸四周的地方须保持清洁及空气流通，亦不能有结构上的缺陷。
• Maintain cleanliness and proper function of the refrigerator . clean it once a week . do not litter
  雪柜要保持清洁和良好运作，每星期要清洗雪柜一次。