"having the qualities of a dog" (mostly in a negative sense), c. 1300, from dog (n.). Meaning "persistent" is from 1779. Hence doggedly (late 14c.), "cruelly, maliciously;" later "with a dog's persistence" (1773). Related: Doggedness.
权威例句
1. He has been dogged by allegations of questionable business practices.
他一直被那些指控他有不正当商业行为的说法所困扰。
2. His career has been dogged by bad luck.
他在事业上一直不走运。
3. A dogged air of confidence exuded.
坚定不移的信心显露无遗。
4. Their dogged single-mindedness is almost heroic.
他们不屈不挠专心致志的劲头简直是一种壮举。
5. I was quite impressed by her dogged determination to succeed.