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[编辑] GRE 红宝书

  • n. 足迹, 踪迹; 轨道; 小道v. 跟踪
  • [英] n. 足迹, 踪迹; 轨道; 小道 ( a narrow path) ;

[编辑] Webster Collegiate

kI. noun

  • Etymology: Middle English trak, from Middle French trac
  • Date: 15th century
  • 1.
    • a. detectable evidence (as the wake of a ship, a line of footprints, or a wheel rut) that something has passed
    • b. a path made by or as if by repeated footfalls ; trail
    • c. a course laid out especially for racing
    • d. the parallel rails of a railroad
    • e.
      • (1) one of a series of parallel or concentric paths along which material (as music or information) is recorded (as on a phonograph record or magnetic tape)
      • (2) a group of grooves on a phonograph record containing recorded sound
      • (3) material recorded especially on or as if on a track <a laugh track><instrumental tracks><a bonus commentary track on a DVD>
    • f. a usually metal way (as a groove) serving as a guide (as for a movable lighting fixture)
  • 2. a footprint whether recent or fossil <the huge track of a dinosaur>
  • 3.
    • a. the course along which something moves or progresses
    • b. a way of life, conduct, or action
    • c. one of several curricula of study to which students are assigned according to their needs or levels of ability
    • d. the projection on the earth's surface of the path along which something (as a missile or an airplane) has flown
  • 4.
    • a. a sequence of events ; a train of ideas ; succession
    • b. an awareness of a fact, progression, or condition <keep track of the costs><lose track of the time>
  • 5.
    • a. the width of a wheeled vehicle from wheel to wheel and usually from the outside of the rims
    • b. the tread of an automobile tire
    • c. either of two endless belts on which a tracklaying vehicle travels
  • 6. track-and-field sports; especially those performed on a running track
  • Synonyms: see trace
  • ? trackless adjective

II. verb

  • Date: 1565
  • transitive verb
    • 1.
      • a. to follow the tracks or traces of ; trail
      • b. to search for by following evidence until found <track down the source>
    • 2.
      • a. to follow by vestiges ; trace
      • b. [trn] t

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