Today's word learning: From WSJ: a victory over fierce rival - 击败强大的对手 Battery-Free, Energy-Harvesting Perpetual Machines: The Weird Future of Computing - 无电池,节能的永动机:计算的奇异未来 legions of investors piled into Moderna Inc. -大量投资者涌入Moderna Inc. When Did Custom Closets Become the Ultimate Status Symbol? - 自定义壁橱何时成为最终身份标志?