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occasional    音标拼音: [ək'eʒənəl]
a. 偶然的,非经常的;特殊场合的,临时的

偶然的,非经常的;特殊场合的,临时的

occasional
adj 1: occurring from time to time; "took an occasional glass of
wine"
2: occurring or appearing at usually irregular intervals;
"episodic in his affections"; "occasional headaches" [synonym:
{episodic}, {occasional}]
3: occurring from time to time; "casual employment"; "a casual
correspondence with a former teacher"; "an occasional worker"
[synonym: {casual}, {occasional}]
4: recurring or reappearing from time to time; "periodic
feelings of anxiety" [synonym: {periodic}, {occasional}]

Occasional \Oc*ca"sion*al\ ([o^]k*k[=a]"zh[u^]n*al), a. [Cf. F.
occasionnel.]
1. Occuring at times, but not constant, regular, or
systematic; made or happening as opportunity requires or
admits; casual; incidental; as, occasional remarks, or
efforts.
[1913 Webster]

The . . . occasional writing of the present times.
--Bagehot.
[1913 Webster]

2. Produced by accident; as, the occasional origin of a
thing. [Obs.] --Sir T. Browne.
[1913 Webster]

3. Of or pertaining to an occasion or to occasions; intended
for a specific occasion; for use only when needed, and not
regularly.
[PJC]

{Occasional cause} (Metaph.), some circumstance preceding an
effect which, without being the real cause, becomes the
occasion of the action of the efficient cause; thus, the
act of touching gunpowder with fire is the occasional, but
not the efficient, cause of an explosion.
[1913 Webster]

74 Moby Thesaurus words for "occasional":
accessory, accidental, accompanying, additional, ado, adventitious,
afloat, afoot, aleatory, auxiliary, behind the scenes, by-the-way,
casual, causal, causative, ceremonial, circumstantial, conditional,
constitutive, contingent, current, decisive, determinative, doing,
effectual, etiological, eventuating, extra, few, formative,
going on, happening, in hand, in the wind, incidental, inessential,
infrequent, institutive, intermittent, irregular, nonessential,
occurring, odd, off, on, on foot, ongoing, originative,
out-of-the-way, parenthetical, part-time, particular, passing,
periodic, pivotal, prevailing, prevalent, provisional, random,
rare, resultant, ritual, scarce, seldom, side, spare, special,
sporadic, supplementary, taking place, uncommon, under way,
unessential, unfrequent

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