"dogged persistence"
"dour determination"
"the most vocal and pertinacious of all the critics"
"a mind not gifted to discover truth but tenacious to hold it"
"men tenacious of opinion"
来自柯林斯例句
来自柯林斯例句
来自柯林斯例句
来自柯林斯例句
来自《简明英汉词典》