The squirrel answered, "I only fulfill my obligation to build up a reserve fund.

松鼠回答："我只是履行自己的职责来建立后备基金。

Maria: Well, I had an obligation to fulfill and I, I came back to fulfill it.

玛丽亚：哦，我有个任务需要完成，所以我，我就回来完成它呀。

Only in this way will each buyer and the seller be able to fulfill its obligation to act in its self-interest.

只有这样才能让买卖双方都履行为自身利益而战的责任。

And I would expect that Pakistan will certainly fulfill that obligation.

我希望巴基斯坦能够履行那些义务。