dogged
adj. 顽强的，坚持不懈的
v. 困扰，纠缠；跟踪，尾随（dog 的过去式和过去分词）
例句
They have, through sheer dogged determination, slowly gained respect for their efforts.
他们凭借顽强的毅力慢慢地为自己的努力赢得了尊重。
《柯林斯英汉双解大词典》
His career has been dogged by bad luck.
他的职业生涯厄运不断。
He had been dogged by bad health all his life.
他一生多病，备受折磨。
《牛津词典》
