plain corner joint

例句：

1. 1. The plain clothes made herlook more professional.
   朴素的衣服让她看起来更专业。
2. 2. The plain design of the dress isvery popular among young women.
   这件裙子的设计简单，很受年轻女性欢迎。
3. 3. Shewore a plain white shirt to the party.
   她穿着一件纯白色的衬衫去参加派对。