It is our duty to keep it clean and tidy.
这是我们的责任保持干净整洁。
We like our language lab and always keep it clean and tidy.
我们很喜欢这个语音室，并且总是保持它的干净整洁。
You can use this room provided that you keep it clean and tidy.
如果你能保持房间干净整洁，你就可以用这间房子。
It is your responsibility to keep the room clean and tidy.
保持房间整洁是你的职责。
It is our duty to keep our environment clean and tidy.
保护我们的环境干净和整洁是我们的责任。
It is our duty to keep our environment clean and tidy.
保持环境的干净整洁是我们每一个人的职责。
Keep quiet in public areas. Keep it tidy and clean. Save water.
注意公共场所的安静、整洁，节约用水。
Keep quiet in public areas. Keep it tidy and clean. Save water.
注意公共场所的安静、整洁，节约用水。
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