七七事变（卢沟桥事变） Lukouchiao Incident of July 7; 1937 July 7th Incident (Lugou Bridge Incident)
七步沟景区 Qibu Trench
高效沟通的七大层面 Seven layers in EC
我在新疆乌苏市白杨沟镇中心学校上学，我现在上上七年级了。
I was in xinjiang wusu poplar ditch school in the town centre, I am in grade seven now.
沟经过程板型如下所述图所示，它涵盖信息送出者、信息、编码、通道、接收者、解码、反馈等七个要素。
Communication process model shown below, which includes seven elements sender, message, coding, channel, receiver, decoding and feedback.
鄂尔多斯盆地； 双山地区； 七里沟砂岩； 浅水三角洲； 沉积体系；
Ordos basin; Shuangshan area; Qiligou Sandstone; Shallow water delta; Sedimentary system;
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