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phases    音标拼音: [f'ezəz] [f'ezɪz]
n. 时期,局面,阶段
v. 逐步实行

时期,局面,阶段逐步实行

Phase \Phase\ (f[=a]z), n.; pl. {Phases} (f[=a]z"[e^]z). [NL.
phasis, Gr. fa`sis, fr. fai`nein to make to appear: cf. F.
phase. See {Phenomenon}, {Phantom}, and {Emphasis}.]
1. That which is exhibited to the eye; the appearance which
anything manifests, especially any one among different and
varying appearances of the same object.
[1913 Webster]

2. Any appearance or aspect of an object of mental
apprehension or view; as, the problem has many phases.
[1913 Webster]

3. (Astron.) A particular appearance or state in a regularly
recurring cycle of changes with respect to quantity of
illumination or form of enlightened disk; as, the phases
of the moon or planets. See Illust. under {Moon}.
[1913 Webster]

4. (Physics) Any one point or portion in a recurring series
of changes, as in the changes of motion of one of the
particles constituting a wave or vibration; one portion of
a series of such changes, in distinction from a contrasted
portion, as the portion on one side of a position of
equilibrium, in contrast with that on the opposite side.
[1913 Webster]

5. (Phys. Chem.) A homogenous, physically distinct portion of
matter in a system not homogeneous; as, the three phases,
ice, water, and aqueous vapor; in a mixture of gasoline
and water, the gasoline will settle as the upper phase. A
phase may be either a single chemical substance or a
mixture, as of gases.
[Webster 1913 Suppl.]

6. (Zool.) In certain birds and mammals, one of two or more
color variations characteristic of the species, but
independent of the ordinary seasonal and sexual
differences, and often also of age. Some of the herons
which appear in white and colored phases, and certain
squirrels which are sometimes uniformly blackish instead
of the usual coloration, furnish examples. Color phases
occur also in other animals, notably in butterflies.
[Webster 1913 Suppl.]

7. (Physics) the relation at any instant of any cyclically
varying physical quantity, such as voltage in an A.C.
circuit, an electromagnetic wave, a sound wave, or a
rotating object, to its initial value as expressed as a
fractional part of the complete cycle. It is usually
expressed in angular measure, the complete cycle being
360[deg]. Such periodic variations are generally well
represented by sine curves; and phase relations are shown
by the relative positions of the crests and hollows of
such curves. Magnitudes which have the same phase are said
to be in phase.

Note: The concept of phase is also applied generally to any
periodically varying phenomenon, as the cycle of
daylight. One person who sleeps during the day and
another who sleeps at night may be said to be out of
phase with each other.
[PJC]

8. Specifically: (Elec.) The relation at any instant of a
periodically varying electric magnitude, as electro-motive
force, a current, etc., to its initial value as expressed
in factorial parts of the complete cycle. It is usually
expressed in angular measure, the cycle being four right
angles, or 360[deg].
[Webster 1913 Suppl.]


Phasis \Pha"sis\, n.; pl. {Phases}. [NL.]
See {Phase}. --Creech.
[1913 Webster] Phasm


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  • PHASE Definition Meaning - Merriam-Webster
    : the point or stage in a period of uniform circular motion, harmonic motion, or the periodic changes of any magnitude varying according to a simple harmonic law to which the rotation, oscillation, or variation has advanced from its standard position or assumed instant of starting
  • PHASE | English meaning - Cambridge Dictionary
    The phases of the moon are the regular changes in its shape as it appears to us on earth
  • Phase (matter) - Wikipedia
    Distinct phases may be described as different states of matter such as gas, liquid, solid, plasma or Bose–Einstein condensate Useful mesophases between solid and liquid form other states of matter
  • Phase - Definition, Meaning Synonyms - Vocabulary. com
    A phase is a particular period of time, like someone whose "teenage rebellion" phase lasts well into her thirties The word phase can mean a stage in a person’s development or a step in a process, such as “the next phase in the Interstate 57 project ”
  • PHASE definition and meaning | Collins English Dictionary
    Unbalanced three-phase circuits are indicated by abnormally high currents in one or more of the phases A phase is one of the circuits in a system in which there are two or more alternating voltages displaced by equal amounts in phase
  • Phases - Chemistry LibreTexts
    Gas, liquid, and solid are known as the three states of matter or material, but each of solid and liquid states may exist in one or more forms Thus, another term is required to describe the various forms, and the term phase is used
  • Phases - definition of phases by The Free Dictionary
    The nearer moon of Mars makes a complete revolution around the planet in a little over seven and one-half hours, so that she may be seen hurtling through the sky like some huge meteor two or three times each night, revealing all her phases during each transit of the heavens
  • phase - Wiktionary, the free dictionary
    phase (plural phases) A distinguishable part of a sequence or cycle occurring over time That which is exhibited to the eye; the appearance which anything manifests, especially any one among different and varying appearances of the same object
  • Phase | Definition Facts | Britannica
    The three fundamental phases of matter are solid, liquid, and gas (vapour), but others are considered to exist, including crystalline, colloid, glassy, amorphous, and plasma phases When a phase in one form is altered to another form, a phase change is said to have occurred
  • PHASE Definition Meaning - Dictionary. com
    One of a set of possible homogenous, discrete states of a physical system States of matter such as solid and liquid are examples of phases, as are different crystal lattice structures in metals such as iron





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