hallmark

她独特的笑声是她的标志性特征。

Her distinctive laugh is the ___hallmark of her personality.

这枚戒指上的标志证明它是纯金制成的。

The ___hallmark on this ring proves it's made of pure gold.

对细节的关注是这家获奖餐厅的标志性特征。

Attention to detail is the ___hallmark of this award-winning restaurant.