A newly built bridge in China’s southwestern province of Sichuan partly collapsed, causing slabs of concrete to plunge onto a rocky mountainside and sending up plumes of dust. No casualties were reported. 中国西南省份四川一座落成不久的桥梁部分坍塌，水泥块坠落在岩石山体上，扬起大量尘土。目前尚无人员伤亡报告。…