If you have the option of opening Windows, let the fresh air in!
如果你可以打开窗户的话，那就让新鲜空气进来。
If you have the option of opening windows, let the fresh air in!
如果能开窗户，那么让新鲜的空气进入吧！
Minimize the use of air-conditioner, and get fresh air by opening the window.
尽量少用空调，经常开窗获取新鲜空气。
When opening the window, I could smell it and pure and fresh air.
当打开窗子，我闻到啦清新的空气。
When opening the window, I could smell it and pure and fresh air.
当打开窗子，我闻到啦清新的空气。
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