泰国一级特色黄一片,国产午夜亚洲精品不卡福利,黄色片久久久,黄页视频在线观看免费

U.S. teachers, students learn desertification control in China

Source: Xinhua| 2019-07-05 16:06:42|Editor: Xiaoxia
Video PlayerClose

32 U.S. teachers and students come all the way to China's Minqin, a man-made oasis, to learn how to combat desertification.

KEY WORDS:
EXPLORE XINHUANET
010020070750000000000000011100001382018451