hope against hope

基本解释

The guy who you know is going to break your heart, but you hope against hope you could be the "one can fix him.
你知道这个家伙会伤你的心，可你希望相信你就是那个能“驾驭他的人”。
But many Nigerians still thirst for new presidential elections—and still quietly hope against hope that they will be held.
但是许多尼日利亚人仍然渴望新的总统选举，他们仍然平静地抱一线希望。
Finally, we hope against hope that we have the courage to ensure that this type of catastrophe can be prevented or mitigated.
最后，我们还是抱有一线希望，希望我们有勇气保证能够预防或者减轻这样的大灾难。

The hope is to develop a vaccine that could give lifelong protection against a majority of flu viruses, including bird flu.
But if you're going to have a big old fort, and you're going to have lots of cannon that you hope to use against your craven, reptile enemies that would want to get in your way, you've got to have people to try out the cannon.
如果你想攻占一个大型的旧式堡垒,你必须要有很多大炮,来对付那些缩在城堡中的敌人,还需要很多士兵来操纵这些大炮
耶鲁公开课 - 欧洲文明课程节选
The hope is that people in all twenty-five countries will be protected against the disease by twenty-fifteen.

Or hope against hope to defer them to the next administration, the next generation?
WHITEHOUSE: President Obama at Points of Light Forum in Texas

to hope very strongly that something will happen, although you know it is not likely