hallmark

n. /ˈhɔːlmɑːrk/ C1

特征；标志；鲜明特点

A typical feature or characteristic of a person or thing.

仙境例句

A slow, sleepy voice was the hallmark of the Caterpillar, even when it was cross.

慢吞吞、懒洋洋的声音是毛毛虫的标志，就连生气时也是这样。