| 释义 |
down-draught|ˈdaʊndrɑːft, -dræft|
1. a. A descending draught or current of air.
1849Card. Wiseman Sense v. Sc. Ess. 1853 III. 603 How the north wind should always drive a down-draught..into the drawing-room. 1907Daily Chron. 25 Oct. 8/5 It was maddening that these harsh down-draughts of the smoke should come to help the enemy. 1961Manch. Guardian 4 Sept. 1/6 The sports plane was apparently caught by a down-draught.
b. attrib. or as adj. Designating a furnace, carburettor, etc., employing a downward draught of air or gas.
1906T. Moore Handbk. Pract. Smithing & Forging ii. 6 These down-draught hearths are now being adopted in many of the modern works. 1935Jrnl. R. Aeronaut. Soc. XXXIX. 503 A centrifugal fan delivers compressed air to a Stromberg down-draught carburettor. 1959Chambers's Encycl. VI. 130/2 Intermittent kilns may be of the rectangular or round down-draught type. 1959Motor Manual (ed. 36) iii. 51 Carburetters may be updraught, horizontal or down-draught, according to the direction in which the main mixture stream is fed into the engine.
2. a. A down-dragging or depressing influence. Sc.
c1788Picken Twa Rats Misc. Poems (1813) I. 68 (Jam.) We yield To nae downdraught but perfect eild. 1850A. M'Gilvray Poems 58 Wives, and wives' friends..are..a d―d down-draught, If they be poor.
b. A ne'er-do-well; a profligate. dial.
1835Aberdeen Shaver Jan. 125 He is..nothing better than a down-draught, or ne'er-do-weel. 1849C. Brontë Shirley xxii, They were chiefly ‘downdraughts’, bankrupts, men always in debt and often in drink.
3. The drawing or displacing of water by an object as it sinks.
1899F. T. Bullen Way Navy 24 The down-draught of the anchor had sucked him after it almost to the bottom.
So down-draw, down-drug. Sc.
c1788Picken Misc. Poems (1813) I. 79 (Jam.) Poortith's sair down-draw. 1814North. Antiq. 429 (Jam.) Love in our hearts will wax..Thro' crosses and down-drug. |