She is very single-minded about her career.

她一心专注于自己的事业。

《牛津词典》

The common factor that links these very different personalities is their single-minded devotion to repeatedly creating specific kinds of upsetting situations. Why would anyone do such a thing?

将这些各种不同性格联系起来的共同因素是对反复制造出具体令人烦恼的情景的一心一意地执着。

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After he made a decision, he would be very single-minded until it got done.

FORBES: Peter Woo Discusses Lessons Learned From Y.K. Pao And His Own Succession Plans

He is a very single-minded guy, and that will be vitally important in the days ahead.

BBC: Alan Hansen's column

Each manager is different, has their own ways of dealing with players or getting involved in training, but most managers Al worked under were very single-minded.

BBC: Alan Hansen's column