中国领衔攻克二十年世界级难题,成功研制钍-229核时钟,重塑人类精密计时体系#中国硬核科研#
Chinese researchers lead the global breakthrough after two decades of exploration, developing the thorium-229 nuclear clock and reshaping ultra-precise timekeeping. #ChineseTechBreakthrough#
CR450复兴号试验时速453公里,运营时速400公里刷新全球高铁速度标杆#CR450高铁#
The CR450 Fuxing bullet train hits a test speed of 453km/h with a 400km/h operational speed, setting a new global high-speed rail benchmark. #CR450HighSpeedRail#