| 释义 |
▪ I. packed, ppl. a.1|pækt|
Also packt.
[f. pack v.1 + -ed1.]
1. a. Put or pressed together closely in a bundle or mass, crowded in, etc.; put into a package or packet: see pack v.1 1–3. Of meals, packaged for transporting and eating on a picnic or in an informal manner.
1777G. Forster Voy. round World I. 102 We sailed through a great quantity of packed or broken ice. 1851H. Martineau Hist. Peace (1877) III. iv. xiv. 146 A closely packed assembly of business-like men. 1876Geo. Eliot Dan. Der. iii. xxiii, The packed-up shows of a departing fair. 1897R. Kipling Capt. Cour. 160 The packed mass ran from the cabin partition to the sliding door. 1958B. Pym Glass of Blessings xvi. 186 Sitting on mackintoshes, eating packed lunches..tramping home again through the rain—one can see how he would yearn after Portugal. 1959‘M. Innes’ Hare sitting Up iii. i. 167 He'll be back in no time. With a nice packed lunch. 1965E. Salter Once upon a Tombstone ii. xvii. 152 How about a trip up the glacier? We could take a packed lunch and make a day of it. 1968Guardian 30 Mar. 10/5 You can..be met at Benbecula by a hired car with a packed meal in it. 1973G. Mitchell Murder of Busy Lizzie iv. 49 We're going to explore the island. Do you think, Father, that we could ask for a packed lunch? 1976Times Lit. Suppl. 5 Nov. 1398/4 What an outing that would have been; you would have needed a packed lunch.
b. Med. Applied to blood cells separated as much as possible from plasma (usu. by centrifugation); esp. in packed-cell volume, the proportion of a sample of blood, by volume, occupied by cells after they have been allowed to settle; cf. hæmatocrit s.v. hæmato-, hemato-.
1933Amer. Jrnl. Med. Sci. CLXXXV. 59 Several students of the blood have again become interested in the determination of the volume of packed red cells by means of various types of hematocrit. 1943Lancet 6 Nov. 576/2 The mean corpuscular hæmoglobin concentration, which is the ratio of the hæmoglobin content of the blood (grammes per 100 c.cm.) to the volume of the packed red cells (hæmatocrit). 1955Ibid. 17 Dec. 1274/2 Investigations.—Blood-count: hæmoglobin 4·7 g. per 100 ml.; packed-cell volume 14%; mean corpuscular hæmoglobin concentration 33%; [etc.]. 1961Ibid. 26 Aug. 490/1 A thirteen-year-old boy required a 250 ml. packed-cell transfusion every four to five weeks. 1967S. Taylor et al. Short Textbk. Surg. i. 11 Packed-cell transfusions are viscid and slow to flow. 1974Jrnl. Appl. Physiol. XXXVII. 976/1 These data were obtained under very carefully controlled conditions (e.g., careful measurement of packed cell volume and resistivity..). 1976Nature 1–8 Jan. 47/2, 0.25 ml of packed cells were added to 2 ml of a medium.
c. Computers. Of, pertaining to, or being a decimal number stored with successive digits represented by successive half-bytes and the sign by the rightmost half-byte.
1964IBM Jrnl. Res. & Devel. VIII. 95 (in figure) Packed decimal number. 1966R. Silverstone in A. Opler Programming the IBM System/360 xi. 126 All internal decimal arithmetic operation[s] must be performed in packed format. Ibid., Since packed numbers require half as much space as zoned decimal numbers, they should be used in storing or writing intermediate files which are not to be directly printed. 1973Murrill & Smith Introd. Computer Sci. vi. 219 To obtain the packed representation from the zoned (or unpacked) representation, we need only to (a) remove all zone fields and (b) transpose the sign and digit fields in the rightmost byte... Systems such as the IBM 360 have hardware instructions to ‘pack’ and ‘unpack’ decimal numbers.
2. Filled with something packed in; as full as it will hold; stuffed, crammed, crowded: see pack v. 7.
1883Scotsman 30 July 4/5 Packed trains were despatched every few minutes. 1886R. Kipling Departm. Ditties, etc. (1899) 69 How shall the women's message reach unto her Above the tumult of the packed bazar?
▪ II. packed, ppl. a.2|pækt|
[f. pack v.2 + -ed.]
Selected or manipulated to serve party ends, as a deliberative assembly, a jury: see pack v.2 4.
1643Prynne Sov. Power Parl. i. 12 It was by this packed over-awed Parliament, and Act, annulled, revoked, and holden as none. 1648‘Mercurius Pragmaticus’ Plea for King 5 By the subscription of a packt grand Jury. 1693J. Edwards Author. O. & N. Test. 80 The pack'd Council of Trent. 1736Neal Hist. Purit. III. 530 This..met with some opposition even in that pack'd assembly. 1844Tupper Heart xi. 119 Loaded dice, packed cards. 1867Bright Sp. Reform 8 Aug., It was not a packed meeting. |