| 释义 |
ˈring-wall
Also ringwall, ring wall.
[f. ring n.1]
1. a. A wall completely surrounding or encircling a certain area. Also fig. (Cf. ring-fence.)
1850Carlyle Latter-d. Pamph. ii. 6 An immense circuit of buildings; cut out, girt with a high ring-wall, from the lanes and streets of the quarter. 1858― Fredk. Gt. ii. vii. (1872) I. 90 The Nürnbergers once..built a ringwall round his Castle. 1875Encycl. Brit. III. 3/2 Athens before the Persian war..was surrounded by a ring-wall of narrow circuit, some..traces of which are supposed to remain. 1944Cape Times 25 Oct., In trade they did not want the ring-wall of the British Empire round them. 1950H. L. Lorimer Homer & Monuments i. 27 A ring-wall of slabs was erected round the graves on the new level. 1963L. F. Chitty in Foster & Alcock Culture & Environment vii. 175 When its site was first ‘bull-dozed’ in 1947, the ruins of a broad ring-wall were revealed, constructed of local tilestones. 1970I. Petite Meander to Alaska ii. xi. 111 He was in the process of repairing the foundation [of a house] with a concrete ring wall.
b. A roughly circular eminence surrounding a crater or mare on the moon or a similar formation on the earth, freq. of volcanic origin.
1950W. Ley Conquest of Space 86 Copernicus is probably the most beautiful of all lunar craters. Its ringwall is 12,000 feet high at the highest point; its diameter is 56 miles. 1962E. A. Vincent tr. Rittmann's Volcanoes iii. 122 Ring-walls (ramparts) with outflows of lava are common. 1966Earth-Sci. Rev. I. 231 The continents [on the Moon] are very mountainous and the mountains and lesser eminences generally form parts of the ‘ringwalls’ of maria and craters. 1968R. W. Fairbridge Encycl. Geomorphol. 682/2 The island [sc. Makatea] rises on all sides from very deep water with a fringing reef.., bounded in the inner side by an abrupt or overhanging cliff of ancient coral limestone... To the inside again, there is a second cliff.., and a second rocky terrace. Within this ring-wall is a moat-like depression.
2. techn. (See quots.)
1875Knight Dict. Mech. 1945/1 Ring-wall (Metallurgy), the inner lining of a furnace. 1879Cassell's Techn. Educ. II. 205/2 In some places..they use a sort of half-muffle, called a ‘ring-wall’, consisting of a lining reaching about half way up the kiln. |