BEIJING, Sept. 17 (Xinhua) -- A Chinese team of scientists on Tuesday published the first research paper on the lunar samples brought back by the Chang'e-6 mission, saying that the Chang'e-6 samples exhibit "distinct characteristics" compared to pre
小程序开发 BEIJING, Sept. 20 (Xinhua) -- A total of 6,130 samples were collected in the doping control program during the Paris Olympic Games, covering 39% of all participating athletes and nearly all the delegations, the International Testing Agency (IT