| 释义 |
terrain, n. (a.)|tɛˈreɪn|
Also 8–9 terrein (9 terrane, in sense 3).
[a. F. terrain (also terrein), OF. terain (Wace 12th c.):—pop.L. *terrānum = cl. L. terrēnum terrene.]
A. n.
1.
†a. (See quot. 1727.) Obs.
b. Standing-ground, position.
1727Bailey vol. II, Terrain,..is the Manage-Ground upon which the Horse makes his Pist or Tread. 1753in Chambers Cycl. Supp. 1816in James Milit. Dict. 1832Lister Arlington II. vii. 117 Viewed in the same light, and from the same terrain from which they view it themselves.
2. a. A tract of country considered with regard to its natural features, configuration, etc.; in military use esp. as affecting its tactical advantages, fitness for manœuvring, etc.; also, an extent of ground, region, district, territory.
1766W. Digby Let. to G. Selwyn 12 Apr., in Jesse S. & Contemp. (1843) II. 13 We rode to reconnoitre the terrein. 1816James Milit. Dict., Terrain,..generally any space or extent of ground. 1879Cassell's Techn. Educ. IV. 95/1 Without reference..to the physical irregularities of the terrain. 1889Baden-Powell Pigsticking 9 Taking in at a glance the peculiarities of the terrain.
b. fig.
1860Princess Royal Let. 3 Dec. in R. Fulford Dearest Child (1964) 288 She will..not [have] such a difficult ‘terrain’ to work upon as God knows I have here. 1979Amer. Poetry Rev. Mar./Apr. 19/4 He found authors in that terrain of brotherhood and contact the reader calls for and which they, the writers I've named and so many others, gave and go on giving by the courses and the conduct which touch their responsibility as Latin Americans.
3. Geol. (Usually spelt terrane.) A name for a connected series, group, or system of rocks or formations; a stratigraphical subdivision.
1823tr. Humboldt's Geognost. Ess. Introd. 2 The union of several formations constitutes a geological series or a district (terrain); but the terms rocks, formations, and terrains, are used as synonymous in many works on geognosy. 1864Dana Man. Geol. 81 (Cent.) Terrane..is used for any single rock or continuous series of rocks of a region, whether the formation be stratified or not. 1889in Q. Jrnl. Geol. Soc. XLV. 63 The word terrane proposed by Prof. Gilbert to be used for a stratigraphical subdivision of any magnitude. 1895Pop. Sci. Monthly Sept. 694 The slates of the Cambrian terrane.
4. attrib. and Comb., as terrain-following radar Aeronaut., a radar system which enables an aircraft or missile to fly at high speed close to the ground by automatically adjusting its altitude in relation to the surface over which it is flying; so terrain follower.
1961Daily Tel. 4 Oct. 17/1 A device known as the ‘terrain follower’, which keeps the plane automatically at a predetermined height above the ground. 1970Times 4 Sept. (Aviation Suppl.) p. ix/8 Advanced avionics technology for the European multirole combat aircraft will be shown, with strike and terrain-following radar. 1980Guardian Weekly 13 July 1/2 Terrain-following radar for low-level penetration of enemy defences.
B. adj. Of the earth, terrene, terrestrial.
a. terrain tide, a (supposed) rise and fall in the earth's crust, caused by the attraction of the sun or moon.
b. terrain cure: see quot.
1882Milne in Nature 8 June 125/2 To determine the existence of a terrain tide, a gravitimeter might be established... If terrain tides exist, and they are sufficiently great from a geological point of view. 1897Allbutt's Syst. Med. IV. 621 Regulated exercises, such as the gentle climbing, especially in mountain districts, known as the terrain cure.
▸ terrain park n. a specially designed outdoor facility having a variety of ramps, jumps, and other apparatus for use in the practice of freestyle snowboarding or skiing, and similar sports.
1991Sunset (Nexis) July 20 Midmountain amenities include..a mountain bike *terrain park resembling a miniature golf course, fraught with obstacles that test your ability to stay in the saddle. 1995R. Reichenfeld Snowboarding 134 Objects like railings and dead trees are strategically placed in terrain parks to allow riders to jib, bonk, and bounce off things to their hearts' content. 2005Calgary Sun (Nexis) 20 Dec. e4 (caption) A skier takes to the air in the terrain park at Lake Louise Mountain Resort over the weekend. |