在商业航天领域，焦点常落在小型火箭制造商如伊萨尔航天（Isar Aerospace）、火箭工厂奥格斯堡（Rocket Factory ...

LOS ANGELES, Aug. 5 (Xinhua) -- Hundreds of structures are threatened by a fast-moving wildfire that has scorched over 82,000 acres (about 332 square km) in less than five days in Central California, ...

CHENGDU, Aug. 6 (Xinhua) -- As Chengdu prepares to host the World Games, the city has placed sustainability, frugality and environmental responsibility at the center of its venue planning and ...