"he wore semiformal attire"
同义词： semi-formal black-tie
以上来源于: WordNet
You don't have to wear swallowtail for the semiformal opening party.
你不必穿燕尾服参加半正式的开幕酒会。
A man's dress jacket, usually black with satin or grosgrain lapels, worn for formal or semiformal occasions.
夜小礼服、晚餐服男式的礼服外套，通常是黑色，有亚麻的或粗丝绸的翻领，在正式或半正式场合穿着。
As is often the case in software, an organized semiformal presentation of the use cases helps you get organized.
正如软件中的常见情况，一个经过整理的半正式用例表示有助于您建立用例。
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