sunken block造句

• From the mountain region of western and center , one part of the rainfall infiltration directly flow towards the east , the others flow towards the deep south , passing through the sunken block and diverting to east also
  西、中部山区得到大气降水入渗补给后，一部分径直向东运动；一部分向南向下绕过地堑继而向东运动。