dogged

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And the sections where she points out that rote repetition and dogged perseverance are your only sure ticket to success.
還有她指出死記硬背和頑強的毅力是你通往成功的唯一可靠的門票這部分也除外。
His victory was in part a tribute to the dogged persistence and quiet moderation of a man who has led his party for eight years.
取得這一勝利的部分原因，是人們肯定一個八年來領導著自己的黨的人，贊頌他頑強的堅持和平靜的謙遜。
As the music finally ends and silence falls, a feeling of satisfaction sweeps over me, satisfaction that after dogged persistence and long practice I have finally accomplished it.
儅這段音樂最終結束，四周廻歸沉寂時，一種滿足感拂過我的身心。通過頑強的堅持和不懈的聯系，我最終得到了這種滿足。

He left office in 2007. Although he has been dogged by several scandals, he has so far avoided prosecution.
At Notre Dame Sunday, President Obama took on the issue that has dogged his visit and sharply divided and polarized Americans for decades - abortion.

Stick-to-itiveness is a real word and a handy noun coined in 1884, meaning dogged perseverance.
FORBES: Do You Prefer Success Or Achievement?
Billions in market value evaporated as Bristol-Myers was dogged by bad luck and worse decisions.
FORBES: The 'Buy' Case For Bristol-Myers

If you describe someone's actions as dogged, you mean that they are determined to continue with something even if it becomes difficult or dangerous.
doggedly