NEW YORK, June 13 (Xinhua) -- Thousands of marching soldiers, dozens of helicopters flying overhead, and hundreds of military vehicles, including at least 28 tanks will all parade through the heart of ...

最近诸事不顺的埃隆·马斯克又迎来了一个坏消息：他引以为傲的 SpaceX 星链（Starlink）卫星正在加速坠向地球 。最近，一组来自美国航空航天局（NASA）和马里兰大学（University of ...