LED
(vbl.)lead的過去式和過去分詞
led
發光二極體
led
發光二極體
Lead v. t. [imp. & p. p. Led p. pr. & vb. n. Leading.]
1. To guide or conduct with the hand, or by means of some physical contact or connection; as, a father leads a child; a jockey leads a horse with a halter; a dog leads a blind man.
If a blind man lead a blind man, both fall down in the ditch. --Wyclif (Matt. xv. 14.)
They thrust him out of the city, and led him unto the brow of the hill. --Luke iv. 29.
In thy right hand lead with thee
The mountain nymph, sweet Liberty. --Milton.
2. To guide or conduct in a certain course, or to a certain place or end, by making the way known; to show the way, esp. by going with or going in advance of. Hence, figuratively: To direct; to counsel; to instruct; as, to lead a traveler; to lead a pupil.
The Lord went before them by day in a pillar of a cloud, to lead them the way. --Ex. xiii. 21.
He leadeth me beside the still waters. --Ps. xxiii. 2.
This thought might lead me through the world's vain mask.
Content, though blind, had I no better guide. --Milton.
3. To conduct or direct with authority; to have direction or charge of; as, to lead an army, an exploring party, or a search; to lead a political party.
Christ took not upon him flesh and blood that he might conquer and rule nations, lead armies, or possess places. --South.
4. To go or to be in advance of; to precede; hence, to be foremost or chief among; as, the big sloop led the fleet of yachts; the Guards led the attack; Demosthenes leads the orators of all ages.
As Hesperus, that leads the sun his way. --Fairfax.
And lo ! Ben Adhem's name led all the rest. --Leigh Hunt.
5. To draw or direct by influence, whether good or bad; to prevail on; to induce; to entice; to allure; as, to lead one to espouse a righteous cause.
He was driven by the necessities of the times, more than led by his own disposition, to any rigor of actions. --Eikon Basilike.
Silly women, laden with sins, led away by divers lusts. --2 Tim. iii. 6 (Rev. Ver.).
6. To guide or conduct one's self in, through, or along (a certain course); hence, to proceed in the way of; to follow the path or course of; to pass; to spend. Also, to cause (one) to proceed or follow in (a certain course).
That we may lead a quiet and peaceable life. --1 Tim. ii. 2.
Nor thou with shadowed hint confuse
A life that leads melodious days. --Tennyson.
You remember . . . the life he used to lead his wife and daughter. --Dickens.
7. Cards & Dominoes To begin a game, round, or trick, with; as, to lead trumps; the double five was led.
To lead astray, to guide in a wrong way, or into error; to seduce from truth or rectitude.
To lead captive, to carry or bring into captivity.
To lead the way, to show the way by going in front; to act as guide. --Goldsmith.
Led imp. & p. p. of Lead.
Led captain. An obsequious follower or attendant. [Obs.] --Swift.
Led horse, a sumpter horse, or a spare horse, that is led along.
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lead
n 1: a soft heavy toxic malleable metallic element; bluish white
when freshly cut but tarnishes readily to dull gray;
"the children were playing with lead soldiers" [syn: Pb,
atomic number 82]
2: an advantage held by a competitor in a race; "he took the
lead at the last turn"
3: evidence pointing to a possible solution; "the police are
following a promising lead"; "the trail led straight to
the perpetrator" [syn: track, trail]
4: a position of leadership (especially in the phrase `take the
lead'); "he takes the lead in any group"; "we were just
waiting for someone to take the lead"; "they didn't follow
our lead"
5: the angle between the direction a gun is aimed and the
position of a moving target (correcting for the flight
time of the missile)
6: the introductory section of a story; "it was an amusing
lead-in to a very serious matter" [syn: lead-in]
7: an actor who plays a principal role [syn: star, principal]
8: (baseball) the position taken by a base runner preparing to
advance to the next base; "he took a long lead off first"
9: an indication of potential opportunity; "he got a tip on the
stock market"; "a good lead for a job" [syn: tip, steer,
confidential information, wind, hint]
10: a news story of major importance [syn: lead story]
11: the timing of ignition relative to the position of the
piston in an internal-combustion engine [syn: spark
advance]
12: restraint consisting of a rope (or light chain) used to
restrain an animal [syn: leash, tether]
13: thin strip of metal used to separate lines of type in
printing [syn: leading]
14: mixture of graphite with clay in different degrees of
hardness; the marking substance in a pencil [syn: pencil
lead]
15: a jumper that consists of a short piece of wire; "it was a
tangle of jumper cables and clip leads" [syn: jumper
cable, jumper lead]
16: the playing of a card to start a trick in bridge; "the lead
was in the dummy"
v 1: take somebody somewhere; "We lead him to our chief"; "can
you take me to the main entrance?"; "He conducted us to
the palace" [syn: take, direct, conduct, guide]
2: result in; "The water left a mark on the silk dress"; "Her
blood left a stain on the napkin" [syn: leave, result]
3: tend to or result in; "This remark lead to further arguments
among the guests"
4: travel in front of; go in advance of others; "The procession
was headed by John" [syn: head]
5: cause to undertake a certain action; "Her greed led her to
forge the checks"
6: stretch out over a distance, space, time, or scope; run or
extend between two points or beyond a certain point;
"Service runs all the way to Cranbury"; "His knowledge
doesn't go very far"; "My memory extends back to my fourth
year of life"; "The facts extend beyond a consideration of
her personal assets" [syn: run, go, pass, extend]
7: be in charge of; "Who is heading this project?" [syn: head]
8: be ahead of others; be the first; "she topped her class
every year" [syn: top]
9: be conducive to; "The use of computers in the classroom lead
to better writing" [syn: contribute, conduce]
10: lead, as in the performance of a composition; "conduct an
orchestra; Bairenboim conducted the Chicago symphony for
years" [syn: conduct, direct]
11: pass or spend; "lead a good life"
12: lead, extend, or afford access; "This door goes to the
basement"; "The road runs South" [syn: go]
13: move ahead (of others) in time or space [syn: precede]
[ant: follow]
14: cause something to pass or lead somewhere; "Run the wire
behind the cabinet" [syn: run]
15: preside over; "John moderated the discussion" [syn: moderate,
chair]
[also: led]
LED
n : diode such that light emitted at a p-n junction is
proportional to the bias current; color depends on the
material used [syn: light-emitting diode]