conservation of energy 名詞
 能量守恆,能量不滅


 Work n.
 1. Exertion of strength or faculties; physical or intellectual effort directed to an end; industrial activity; toil; employment; sometimes, specifically, physical labor.
 Man hath his daily work of body or mind
 Appointed.   --Milton.
 2. The matter on which one is at work; that upon which one spends labor; material for working upon; subject of exertion; the thing occupying one; business; duty; as, to take up one's work; to drop one's work.
 Come on, Nerissa; I have work in hand
 That you yet know not of.   --Shak.
    In every work that he began . . . he did it with all his heart, and prospered.   --2 Chron. xxxi. 21.
 3. That which is produced as the result of labor; anything accomplished by exertion or toil; product; performance; fabric; manufacture; in a more general sense, act, deed, service, effect, result, achievement, feat.
    To leave no rubs or blotches in the work.   --Shak.
 The work some praise,
 And some the architect.   --Milton.
 Fancy . . .
 Wild work produces oft, and most in dreams.   --Milton.
    The composition or dissolution of mixed bodies . . . is the chief work of elements.   --Sir K. Digby.
 4. Specifically: (a) That which is produced by mental labor; a composition; a book; as, a work, or the works, of Addison. (b) Flowers, figures, or the like, wrought with the needle; embroidery.
 I am glad I have found this napkin; . . .
 I'll have the work ta'en out,
 And give 't Iago.   --Shak.
 (c) pl. Structures in civil, military, or naval engineering, as docks, bridges, embankments, trenches, fortifications, and the like; also, the structures and grounds of a manufacturing establishment; as, iron works; locomotive works; gas works.  (d) pl. The moving parts of a mechanism; as, the works of a watch.
 5. Manner of working; management; treatment; as, unskillful work spoiled the effect.
 6. Mech. The causing of motion against a resisting force. The amount of work is proportioned to, and is measured by, the product of the force into the amount of motion along the direction of the force.  See Conservation of energy, under Conservation, Unit of work, under Unit, also Foot pound, Horse power, Poundal, and Erg.
    Energy is the capacity of doing work . . . Work is the transference of energy from one system to another.   --Clerk Maxwell.
 7. Mining Ore before it is dressed.
 8. pl. Script. Performance of moral duties; righteous conduct.
    He shall reward every man according to his works.   --Matt. xvi. 27.
    Faith, if it hath not works, is dead.   --James ii. 17.
 9. Cricket Break; twist. [Cant]
 10.  Mech. The causing of motion against a resisting force, measured by the product of the force into the component of the motion resolved along the direction of the force.
    Energy is the capacity of doing work. . . . Work is the transference of energy from one system to another.    --Clerk Maxwell.
 11.  Mining Ore before it is dressed.
 Muscular work Physiol., the work done by a muscle through the power of contraction.
 To go to work, to begin laboring; to commence operations; to contrive; to manage.  “I 'll go another way to work with him.” --Shak.
 To set on work, to cause to begin laboring; to set to work. [Obs.] --Hooker.
 To set to work, to employ; to cause to engage in any business or labor.


 Con·ser·va·tion n.  The act of preserving, guarding, or protecting; the keeping (of a thing) in a safe or entire state; preservation.
    A step necessary for the conservation of Protestantism.   --Hallam.
    A state without the means of some change is without the means of its conservation.   --Burke.
 Conservation of areas Astron., the principle that the radius vector drawn from a planet to the sun sweeps over equal areas in equal times.
 Conservation of energy, or Conservation of force Mech., the principle that the total energy of any material system is a quantity which can neither be increased nor diminished by any action between the parts of the system, though it may be transformed into any of the forms of which energy is susceptible.

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 Cor·re·la·tion n.  Reciprocal relation; corresponding similarity or parallelism of relation or law; capacity of being converted into, or of giving place to, one another, under certain conditions; as, the correlation of forces, or of zymotic diseases.
 Correlation of energy, the relation to one another of different forms of energy; -- usually having some reference to the principle of conservation of energy.  See Conservation of energy, under Conservation.
 Correlation of forces, the relation between the forces which matter, endowed with various forms of energy, may exert.

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 conservation of energy
      n : the fundamental principle of physics that the total energy
          of an isolated system is constant despite internal
          changes [syn: law of conservation of energy, {first law
          of thermodynamics]