Southwest wall to remain a wooden frame, for the installation of doors, leaving a circular roof canopy to lighting, ventilation, smoke emission, night or rain snow covered with felt.
西南壁上留一木框，用以安装门板，帐顶留一圆形天窗，以便采光、通风，排放炊烟，夜间或风雨雪天覆以毡。
2
CO2 emission flux of soil under several vegetation covers during daytime is higher than that at night, and afternoon higher than the morning.