etui

例句：

1. 1.The little goose is a symbol of good luck in Chinese culture.
   小鹅在中国文化中是好运的象征。
2. 2. The riverbank is lined with smooth, round stones known as "etui."
   河岸上布满了光滑圆润的鹅卵石，被称为“鹅卵石”。
3. 3.The baby goose was so cute that it made everyone smile.
   那只小鹅非常可爱，让每个人都笑了。