代表一部分长城建于明朝时代位于山海关，古北口和居庸关。
Representative sections of the Great Wall built in Ming times are situated near Shanhai Pass, Gubeikou and Juyong Pass.
潮白河流域密怀山前地区处于古北口—天竺东北信风带 ，自然和人为因素导致风沙化环境渐趋强烈 ，成为首都沙尘暴天气中就地起沙的源区之一。
Natural and man made factors make sand blown by wind environment, one of sourse regions of sand getting up on the spot during capital sand dust devil weathers, worse and worse.
承德地区土城子组的沉积地层，主要保存在两个地区，一处为承德向斜，另一处为古北口断层的南部紧邻断层地区，即分别命名的承德盆地和古北口盆地内。
The sedimentation of Tuchengzi Formation was mainly preserved in Chengde syncline and in the south part of Gubeikou fault in Chengde area, namely Chengde basin and Gubeikou basin, respectively.
承德地区土城子组的沉积地层，主要保存在两个地区，一处为承德向斜，另一处为古北口断层的南部紧邻断层地区，即分别命名的承德盆地和古北口盆地内。
The sedimentation of Tuchengzi Formation was mainly preserved in Chengde syncline and in the south part of Gubeikou fault in Chengde area, namely Chengde basin and Gubeikou basin, respectively.
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