obliged to   (TTS發音)

1. required to不得不

    He was obliged to leave his home town 30 years ago. 30年前他被迫離開了家鄉。

    They were obliged to give up the chance. 他們不得不放棄這次機會。

2. acknowledging a favor received 感激

    I will be much obliged to you for an early reply. 盡早賜復，不勝感激。

    We are much obliged to you for your help. 我們非常感謝你的幫助。