我去参加一个正式的晚宴所以穿了一身礼服此语已不再常用但年长的人有时还在使用在旧影片中偶尔也能听到
I went to a formal dinner party, so I wore a formal dress. This phrase is no longer commonly used, but older people still use it sometimes. It can also be heard occasionally in old films
以上为机器翻译结果，长、整句建议使用 人工翻译 。