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。

"Lounge suits are normal business suits, worn for semiformal occasions with a shirt and tie-unless no tie is specified," says Ms. Willis.

威利斯说：“‘西装正装’就是普通商务装，穿衬衫打领带，适合半正式场合，除非明确说明不打领带。”

The next confusion will come in the form of whether to go for formal wedding dress for your Montpelier wedding or semiformal wedding dress.

接下来的问题到底是选择正式的婚纱还是半正式的。