single-minded 专心致志的；一心一意的；专一；专一的；诚实

【例句】
Her single-minded commitment to the job meant that she had little time left for her family.
她对工作的一心一意的奉献意味着她很少有时间留给自己的家庭。

She is very single-minded about her career.
她一心专注于自己的事业。