The earth's magnetosphere is at once protective and dangerous.地球的磁层既具有保护的功能，却又极其危险。This animation shows a conceptual sketch of Mercury's magnetosphere at the time of the MESSENGER flyby.这个动画是信使号探测船探测水星磁层时的模拟图.A...
当地的居民看见它伴着一声震耳欲聋的巨响撞向地面。Local residents saw it plunge towards Earth with a deafening roar.一架飞机一头栽向地面.A plane plummeted to earth.飞机向地面坠落.The airplane fell towards the earth....
...tickets and other printed ephemera.票据和其他短时效的印刷品a collection of postcards, tickets and other ephemera明信片、票证和其他短时效物品的收藏系列...Victorian ephemera.维多利亚时期短时效用品的收藏Large new souvenir shop, antique and ephemera sales on the gro...
He's becoming more and more obsessive about punctuality.他对守时要求越来越过分了。He's been taken to task for his habitual lack of punctuality.他因为经常不准时而受到批评.He gave the child a lecture on the importance of punctuality.他教训孩子...