worth one's salt

v.

称职，胜任；

WORTH ONE'S SALT
Worth one's salt
Worth one's salt: the master dysnatremia equation
Worth one's salt: the master dysnatremia equation.
Worth One's Salt: From Fleur de Sel to Kosher, Which Salt is Best?
Worth one ’ s salt : the master dysnatremia equation
Salt的妙用
英语词语漫谈:Salt的词源及用法
Systems and Methods of Detecting and Demonstrating Hair Damage Via Detection of Protein Loss
Worth his salt