un·nec·es·sary /ˌʌnˈnɛsəˌsɛri/
(a.)不必要的,無用的,無益的
Un·nec·es·sa·ry a. Not necessary; not required under the circumstances; unless; needless; as, unnecessary labor, care, or rigor. -- Un*nec*es*sa*ri*ly adv. -- Un*nec*es*sa*ri*ness, n.
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unnecessary
adj : not necessary [syn: unneeded] [ant: necessary]