1. But few foreign graduates came home to "pay their pledge", as Nehru had put it.
    但是只有寥寥无几的海外留学生像尼赫鲁所说的那样学成后回国"履行他们的诺言"。

2. The gambler had no more money and put his house in pledge.
    那赌徒拿不出什么钱来了, 就把自己的房子作了抵押。

3. I gave him my pledge that I would vote for him.
    我向他保证我将投他的票。