Human development

  An underwater tunnel is a tunnel which is partly  or wholly constructed under the sea or a river Have you ever thought that one day, high-speed rail will be able to run under the sea?  As a major country in infrastructure construction,  China has been building roads and bridges frantically in recent decades.  China builds the world's longest undersea tunnel.  It is understood that to take up the connection between Zhoushan and Ningbo ,  China plans to invest 4 billion dollars to build the world's longest undersea high-speed rail tunnel,  Chinese engineers named it the Jintang undersea tunnel.  At present,  there are more than 20 undersea tunnels that have been built or are planned to be built around the world,  among which there are many representative world-class undersea tunnels,  such as the British and French undersea tunnels,  the Seikan tunnel, and the Tsushima Strait Tunnel in Japan.  According to Chinese pl...

Weight loss is defined as  the reduction in body mass and body fat so  today we'll explore the  question what are 10 medical causes of  rapid weight  lessons  most of us will  experience fluctuations  in our  weight and  it is common to lose or even  gain weight  over time   with all the stats you hear today about  worldwide obesity  you might think of weight loss as an  inherently good thing  but when weight loss is rapid and  unintended it can in fact signal  a worrisome underlying medical condition  rapid weight loss is generally defined  as unintentional weight loss to be  five percent or greater weight reduction  over a six to twelve month period  while typical weight loss is due to a  change in lifestyle habits such as  decreased caloric intake  or an increase in physical activity  unexpected and unintended weight loss  can throw up some ...