English主要词典
needless
Universal Words
adjective
needless death or suffering is not necessary because it could have been avoided:
needless anxiety / suffering * Banning smoking would save needless deaths.
needlessly adverb:
Many soldiers died needlessly. * The process was needlessly slow.
IDIOMS
needless to say used to emphasize that the information you are giving is obvious:
The problem, needless to say, is the cost involved.