科技日报讯（记者张佳欣）德国于利希研究中心的研究人员研制出全球首个二维半金属材料并获实验证实。该材料是一种仅允许单一自旋方向（“自旋向上”或“自旋向下”）电子导电的材料。相关成果发表于最新一期《物理评论快报》，标志着新一代高能效自旋电子学材料研究取得重要突破。

黑足猫生活在南非干旱草原和稀树草原中，它们是非洲体型最小的野生猫科动物，体长在35-52厘米间，体重在1.1-2.5公斤之间，实际上就平均体重而言，所有猫科动物中只有锈斑豹猫比它们更小。

American TV star Larry King reveals the secret of his success in Take Away English. And you learn some related vocabulary too ...

BEIJING, July 20 (Xinhua) -- China has discovered the world's deepest sandstone-type industrial uranium mineralization at a depth of 1,820 meters in the Tarim Basin, Xinjiang Uygur Autonomous Region, ...

Almost two million married couples in the UK try to keep their finances secret from their partner. Take Away English talks about relationships and money.