“一线希望” 用英语怎么说？

“一线希望”英文怎么说？
silver lining
源自英语谚语“Every cloud has a silver lining”
意思是“黑暗中总有一线光明”
就算遇到困难也要往积极的方面看

例：
When things look black, there's always a silver lining.
当事情看起来很黑暗的时候，总会有一线希望。

a glimmer / ray of hope
glimmer [ˈɡlɪmə(r)] 和 ray [reɪ] 都可以表达“一线”
例：
The letter offered us a glimmer/ray of hope.
这封信给了我们一线希望。

hope against hope
抱一线希望
例：
They're just hoping against hope that she's still alive.
他们对她还活着仍抱一线希望。

“在某种程度上”英文怎么说？
up to a point
在某种程度上，在一定程度上

例：
Of course there is some truth in all this, but only up to a point.
这当然有些道理，但仅在一定程度上。

in a way / in one way
英文词典解释：
“
If you say that something is true in a way, you mean that although it is not completely true, it is true to a limited extent or in certain respects.
即：你的意思是尽管它不是完全正确的，但在一定程度上或在某些方面是正确的。

例：
In a way, I suppose I'm frightened of failing.
在某种程度上，我想我害怕失败。

to some extent / to a certain extent
或
to some degree / to a degree
例：
To some extent, she was responsible for the accident.
在某种程度上，她对这次事故负有责任。