Therefore, the problem of plastic shack at the subtropical zone in winter and spring and at the temperate zone in spring cooling down by naturalaeration can be solved;
从而能有效地解决塑料大棚在亚热带冬春季和暧温带的春季以自然通风实现棚内的降温；
2
Based on the principle of suction, a naturalaeration method is proposed for prevention of Karst collapse, which has been tried in some areas in China with satisfactory results.
在真空吸蚀原理的基础上，提出了防治塌陷的自然充气法，在中国某些地区试验效果良好。
3
I have used a coconut fiber mat in a wire basket to hold the peat moss and seedlings, the natural fiber mat assists the peat moss with drainage and aeration, it also stops the moss becoming to soggy.