They found that turning the airoff for a set amount of time maximized nitrogen and organic compound removal.
他们发现，在一定时间内关闭空气流通可以最大程度上减少氮和有机化合物的含量。
2
You can record videos (at a high 720 by 480 resolution, although they don’t look any sharper) and upload them to YouTube, but you can’t trim the dead airoff the ends first.
你可以录视频（分辨率为较高的720 x 480，尽管看起来不是更清晰）并上传到 YouTube，但你不能先剪辑掉头尾的停滞区域。
3
This helps because the plastic cover keeps the stamps off the wet air.