成人自拍视频

On 27 May 2020, under the sky with light rain, at the construction site of the Panzhihua-Dali highway general section, white smoke was emitted from the asphalt pavement from time to time, and the rumb...

Yesterday, members of the Postgraduate Voluntary Teaching Corps of Tsinghua University spent a special Children's Day with their students who are residing in impoverished areas. They are taking a...

Soil organic carbon (SOC) stored in permafrost across the high-latitude/altitude Northern Hemisphere represents an important potential carbon source under future warming. Here, we provide a comprehens...

Professors Chen Yong Can and his research guroup accepted the award on January 10th at the annual National Science-Technology Award Ceremony in the Great Hall of the People in Beijing.The research pro...

On November 28, the symposium themed key technology of cross-strait channel (submerged floating tunnel), which is a major scientific problem and engineering technical problem of China Association for ...

Feedbacks of physical processes affect the and function of Earth surface and atmosphere system over different temporal and spatial scales. Rivers are the feedback product of turbulent stream flow and ...