plain elbow

例句：

1. 1. The plain clothes made him look more professional.
   朴素的衣服让他看起来更专业。
2. 2. The plain design of the dress is very popular among young women.
   这款连衣裙的设计简单，很受年轻女性欢迎。
3. 3. The plain tablecloth was a welcome change from the elaborate dinner service.
   朴素的桌布与繁复的餐桌服务形成了鲜明的对比。