He is regarded as a tenacious and persistent interviewer.

他被认为是个执著坚毅的采访者。

《柯林斯英汉双解大词典》

She's a tenacious woman. She never gives up.

她是个坚毅的人，从不放弃。

《牛津词典》

If there are more tenacious spots to clean off, you can use a wet rag to rub them clean.

如果有顽固污渍的地方需要清理，你可以用块湿抹布擦干净。

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"And I long for the day when that modifier can be a moot point, but I'm ever grateful if I can inspire some young intrepid tenacious male or female filmmaker, and have them feel that the impossible is possible.

VOA: standard.2010.03.08

General Zinni, a tenacious negotiator with a no-nonsense demeanour, may get round it.

ECONOMIST: Israel and the Palestinians

However, it is a tenacious company with a lot of money behind it, an appetite for wireless, and a desire for control over everything it does.

FORBES: Guess Who Keeps Wireless Operators Up At Night?

What some listeners may hear as incivility or rudeness may simply be the product of a broadcast journalist making a tenacious effort to steer an experienced politician toward providing responsive answers instead of reading from a scripted playbook of party messages.

NPR: Delicate Art of the Interview: Civility vs. Tenacity