| 释义 |
scan
I. \ˈskan, -aa(ə)n\ verb
(scanned ; scanned ; scanning ; scans)
Etymology: Middle English scannen, from Late Latin scandere to climb, scan verses, from Latin, to climb; akin to Greek skandalon trap, stumbling block, offense, Sanskrit skandati he leaps, Middle Irish scendim I leap
transitive verb
1.
a. : to analyze (verse) so as to exhibit rhythmic and especially metrical structure
b. : to indicate rhythmic or metrical structure of (verse)
2. archaic : to test the correctness, importance, or value of : judge critically
< know then thyself, presume not God to scan — Alexander Pope >
3.
a.
(1) : to make an intensive examination of (a small area)
< scanning each vein of rock for the telltale glint of yellow metal — R.A.Billington >
< scanned their faces as they passed — Joseph Conrad >
< scanned closely the claims of individuals as against the state — B.R.Trimble >
(2) : to check (as a magnetic tape or a punch card) for recorded data by means of a mechanical or electronic device
b. : to make a thorough search of (a wide area) usually by eye (as by moving one's eyes in repeated sweeping motions from side to side)
< scanning the forest with binoculars, on the lookout for fire — Isaac Rosenfeld >
< scan the field of medicine — Sara Jordan >
c. : to look through or over hastily
< read several and scan the rest — Kermit Ely >
< scanned the film advertisements — D.M.Davin >
4. archaic : discern
< not wise enough to scan his best concerns aright — William Cowper >
5. obsolete : to explain the meaning of : interpret
6.
a. : to subject (as an image or picture) to scanning
b. : to cause a narrow beam of light to shine through (a sound track) or to traverse (an object) in order to translate light modulations into a corresponding electrical current
c. : to direct a succession of radar beams so that they traverse (a prescribed area) in searching for a target
intransitive verb
1. : to scan verse
2. : to admit of being scanned : conform to or reveal a definite metrical pattern
Synonyms: see scrutinize
II. noun
(-s)
1. : the act or process of scanning : a close examination
< the captain spins the periscope, making a quick scan of the situation — E.L.Beach >
2. : range of vision : apprehension
< the authors' scan was limited — Current Biography >
3. : a radar display
III. transitive verb
1. : to make a scan of (as a human body)
2. : to pass over in the formation of an image
< the electron beam scans the picture tube >
IV. noun
1.
a. : a depiction (as a photograph) of the distribution of radioactive material in something (as a body organ)
b. : an image of a bodily part produced (as by computer) by combining ultrasonographic or radiographic data obtained from several angles or sections
2. : trace 5c |