| 释义 |
Examples:the Grand Canal, 1800 km from Beijing Hangzhou, built starting from 486 BC—the Grand canal, 1800 km from Beijing Hangzhou, built starting from 486 BC—Aleutian islands (trailing 2250 km southwest of Alaska almost down Kamtchatka)—Mach (aeronautics), unit of speed based on speed of sound = 1 Mach = 1224 km per hr—shallow earthquake (with epicenter less than 70 km deep)—Donghai Bridge, 32.5 km bridge between Shanghai and the offshore Yangshan deep-water port—mile (unit of length equal 1.609 km)—medium depth earthquake (with epicenter 70-300 km deep)—Mach number, multiples of speed of sound used as unit in aeronautics, with 1 Mach = 1224 km per hr—unit of distance equal one-thirtieth km or 33.33 meters—Zhengguo canal, a 150 km long irrigation canal in Shaanxi built in 264 BC—Dongchang-ni, North Korean missile launch site on Yellow Sea, 70 km from Chinese border—deep earthquake (with epicenter more than 300 km deep)—Naypyidaw or Nay Pyi Taw, jungle capital of Myanmar (Burma) since November 2005, 300 km north of Rangoon and 300 km south of Mandalay— |