double-chinned

例句：

1. 1. She had a double chin that made her look older than she was.
   她有一个双层下巴，让她看起来比实际年龄要大。
2. 2. The man's double chin gave him an unattractive appearance.
   这个男人的双层下巴让他看起来很不吸引人。
3. 3.The double chin is often associated with aging and weight gain.
   双层下巴通常与老化和体重增加有关。