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  1. It may sound gruesome, but it turns out that maggots are remarkably efficient at cleaning up infected wounds by eating dead tissue and killing off bacteria that could block the healing process.
    这听起来可能令人毛骨悚然,但结果显示,蛆会吃掉死去的组织,并杀光可能妨碍愈合过程的细菌,在清理遭感染的伤口上具有惊人的效率。



Dead \Dead\ (d[e^]d), a. [OE. ded, dead, deed, AS. de['a]d; akin
to OS. d[=o]d, D. dood, G. todt, tot, Icel. dau[eth]r, Sw. &
Dan. d["o]d, Goth. daubs; prop. p. p. of an old verb meaning
to die. See {Die}, and cf. {Death}.]
1. Deprived of life; -- opposed to {alive} and {living};
reduced to that state of a being in which the organs of
motion and life have irrevocably ceased to perform their
functions; as, a dead tree; a dead man. ``The queen, my
lord, is dead.'' --Shak.

The crew, all except himself, were dead of hunger.
--Arbuthnot.

Seek him with candle, bring him dead or living.
--Shak.

2. Destitute of life; inanimate; as, dead matter.

3. Resembling death in appearance or quality; without show of
life; deathlike; as, a dead sleep.

4. Still as death; motionless; inactive; useless; as, dead
calm; a dead load or weight.

5. So constructed as not to transmit sound; soundless; as, a
dead floor.

6. Unproductive; bringing no gain; unprofitable; as, dead
capital; dead stock in trade.

7. Lacking spirit; dull; lusterless; cheerless; as, dead eye;
dead fire; dead color, etc.

8. Monotonous or unvaried; as, a dead level or pain; a dead
wall. ``The ground is a dead flat.'' --C. Reade.

9. Sure as death; unerring; fixed; complete; as, a dead shot;
a dead certainty.

I had them a dead bargain. --Goldsmith.

10. Bringing death; deadly. --Shak.

11. Wanting in religious spirit and vitality; as, dead faith;
dead works. ``Dead in trespasses.'' --Eph. ii. 1.

12. (Paint.)
(a) Flat; without gloss; -- said of painting which has
been applied purposely to have this effect.
(b) Not brilliant; not rich; thus, brown is a dead color,
as compared with crimson.

13. (Law) Cut off from the rights of a citizen; deprived of
the power of enjoying the rights of property; as, one
banished or becoming a monk is civilly dead.

14. (Mach.) Not imparting motion or power; as, the dead
spindle of a lathe, etc. See {Spindle}.

15. (Elec.) Carrying no current, or producing no useful
effect; -- said of a conductor in a dynamo or motor, also
of a telegraph wire which has no instrument attached and,
therefore, is not in use.
[Webster 1913 Suppl.]

16. Out of play; regarded as out of the game; -- said of a
ball, a piece, or a player under certain conditions in
cricket, baseball, checkers, and some other games.

[In golf], a ball is said to lie dead when it lies
so near the hole that the player is certain to hole
it in the next stroke. --Encyc. of
Sport.
[Webster 1913 Suppl.]

{Dead ahead} (Naut.), directly ahead; -- said of a ship or
any object, esp. of the wind when blowing from that point
toward which a vessel would go.

{Dead angle} (Mil.), an angle or space which can not be seen
or defended from behind the parapet.

{Dead block}, either of two wooden or iron blocks intended to
serve instead of buffers at the end of a freight car.

{Dead calm} (Naut.), no wind at all.

{Dead center}, or {Dead point} (Mach.), either of two points
in the orbit of a crank, at which the crank and connecting
rod lie a straight line. It corresponds to the end of a
stroke; as, A and B are dead centers of the crank
mechanism in which the crank C drives, or is driven by,
the lever L.

{Dead color} (Paint.), a color which has no gloss upon it.

{Dead coloring} (Oil paint.), the layer of colors, the
preparation for what is to follow. In modern painting this
is usually in monochrome.

{Dead door} (Shipbuilding), a storm shutter fitted to the
outside of the quarter-gallery door.

{Dead flat} (Naut.), the widest or midship frame.

{Dead freight} (Mar. Law), a sum of money paid by a person
who charters a whole vessel but fails to make out a full
cargo. The payment is made for the unoccupied capacity.
--Abbott.

{Dead ground} (Mining), the portion of a vein in which there
is no ore.

{Dead hand}, a hand that can not alienate, as of a person
civilly dead. ``Serfs held in dead hand.'' --Morley. See
{Mortmain}.

{Dead head} (Naut.), a rough block of wood used as an anchor
buoy.

{Dead heat}, a heat or course between two or more race
horses, boats, etc., in which they come out exactly equal,
so that neither wins.

{Dead horse}, an expression applied to a debt for wages paid
in advance. [Law]

{Dead language}, a language which is no longer spoken or in
common use by a people, and is known only in writings, as
the Hebrew, Greek, and Latin.

{Dead plate} (Mach.), a solid covering over a part of a fire
grate, to prevent the entrance of air through that part.


{Dead pledge}, a mortgage. See {Mortgage}.

{Dead point}. (Mach.) See {Dead center}.

{Dead reckoning} (Naut.), the method of determining the place
of a ship from a record kept of the courses sailed as
given by compass, and the distance made on each course as
found by log, with allowance for leeway, etc., without the
aid of celestial observations.

{Dead rise}, the transverse upward curvature of a vessel's
floor.

{Dead rising}, an elliptical line drawn on the sheer plan to
determine the sweep of the floorheads throughout the
ship's length.

{Dead-Sea apple}. See under {Apple}.

{Dead set}. See under {Set}.

{Dead shot}.
(a) An unerring marksman.
(b) A shot certain to be made.

{Dead smooth}, the finest cut made; -- said of files.

{Dead wall} (Arch.), a blank wall unbroken by windows or
other openings.

{Dead water} (Naut.), the eddy water closing in under a
ship's stern when sailing.

{Dead weight}.
(a) A heavy or oppressive burden. --Dryden.
(b) (Shipping) A ship's lading, when it consists of heavy
goods; or, the heaviest part of a ship's cargo.
(c) (Railroad) The weight of rolling stock, the live
weight being the load. --Knight.

{Dead wind} (Naut.), a wind directly ahead, or opposed to the
ship's course.

{To be dead}, to die. [Obs.]

I deme thee, thou must algate be dead. --Chaucer.

Syn: Inanimate; deceased; extinct. See {Lifeless}.

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