n.纯度标记；标志；特征
vt.标纯度
One hallmark of a good politician is his ability to influence people. 衡量一个优秀政治家的标志之一就是他影响大众的能力。
Clear expression is the hallmark of a good speaker. (喻)清晰的表达能力是一位出色的演说家的特征。
用作及物动词 (vt.)Given the prevalence of synthetic Alexandrite, they are also a fascinating hallmark of authenticity that helps us distinguish real gems from artificial impostors. 在人工合成亚力山大石流行的今天，内含物是鉴别宝石天然纯度的一个重要标志，有助于我们将天然宝石与人工合成赝品区别开来。
