1. Being overly eager to return favor is in fact an act of ungratefulness. 过分地急于还礼，其实是一种忘恩的行为。
2. When we are successful, we can surely have many reasons for being grateful, we have one excuse to show ungratefulness if we fail. 我们成功时，有千万个理由感恩生活，而失败时，只要一个借口就会表现出忘恩负义。
3. When we are successful, we can surely have many reasons for being grateful, but we have only one excuse to show ungratefulness if we fail. 如果一味怨恨，终将一无所获。我们成功时，有千万个理由感恩生活，而失败时，只要一个借口就会表现出忘恩负义。
