If a spacecraft travels faster than 11 km a second, it escapes the Earth's gravitational pull.(如果一架宇宙飛船飛行超過每秒11公里，它就能擺脫地球引力。)

Johann Franz Encke, Director of the Berlin Observatory, finally determined a value for the AU based on all these parallax measurements: 153,340,000 km.(柏林天文臺主任約翰·弗朗茨·恩克最終根據所有這些視差測量結果確定了天文單位的一個值為153,340,000公里。)

Each tower serves an area of approximately 3 sq km.(每個基站的服務范圍大概是3平方公里。)

According to a report, Google's self-driving cars clocked 1,023,330 km, and required human intervention 124 times.(據報道，谷歌的自動駕駛汽車行駛了1023330公里，有124次需要人工干預。)

You start by running 5 km, move up to a 10 km, then a half marathon.(你先跑5公里，再跑10公里，然后跑半程馬拉松。)

Every Saturday morning, at 9 am, more than 50,000 runners set off to run 5 km around their local park.(每周六早上9點，5萬多名跑步者出發，繞著他們當地的公園跑5公里。)

The country has only 23 Km of coastline.(國家只擁有23公里的海岸線。)

The various parts of The Falkirk Wheel were all constructed and assembled, like one giant toy building set, at Butterley Engineering's Steelworks in Derbyshire, some 400 km from Falkirk.(福爾柯克摩天輪的各個部件都是在距離福爾柯克約400公里的德比郡巴特利工程公司的鋼鐵廠建造和組裝的，就像一個巨大的玩具建筑。)

Why 36 km?(為什么是36千米？)

That is one intervention about every 8,047 km of autonomous driving.(這相當于每行駛8047公里的自動駕駛里程，（駕駛員）要手動干涉一次。)