to continue to hold; to hold on to (for a long period); to maintain; to keep
彼は夢を持ち続けている。
He continues to hold onto his dream.
信念を持ち続けた結果、成功を収めた。
As a result of holding on to his beliefs, he achieved success.
疑問を持ち続けることが研究者に必要だ。
Continuing to hold questions is necessary for researchers.