special fastener

例句：

1. 1. This is a special occasion that we've never had before.
   这是我们从未有过的特别场合。
2. 2. The special sauce is the secret ingredient in this dish.
   这种特殊酱汁是这道菜的秘密成分。
3. 3.She has a special talent for painting landscapes.
   她有绘画风景的特别才能。