at best

基本解释

The value of credit — at best — returns to the level it was before the program began.
信贷的规模在最好的情况下也就是回到原先该计划开始前的水平。
While several proprietary and open source tools meet one or two of the requirements, there are, at best, a lot of configuration complexities along the way.
尽管一些专有的和开放源代码工具能够满足一个或者两个需求，但即使在最好情况下，整个过程在配置上也是非常复杂的。
At best the actor will leave us a photograph, and nothing of what he was himself, his gestures and his silences, his gasping or his panting with love, will come down to us.
而一个演员即使在他的巅峰状态，也只是给我们留下了一张照片，他的真实自我、动作、沉默、爱情的喘息并不会流传下来。

Songwriter William Gilbert, in the musical "Princess Ida",wrote: "Darwinian man,though well-behaved, at best is only a monkey shaved."
He says: It had only been through books, at best no more than vicarious cultural transfusions, that I had managed to keep myself alive in a negatively vital way.
并加以思索，他说，：,“唯有通过读书，这种让文化在我心中产生共鸣的方式,才能维系我生存的勇气。
耶鲁公开课 - 1945年后的美国小说课程节选
I think it's really the best class I'm taking or the best series of classes I've taken at Princeton,
我认为这门课是我在普林斯顿上过的最好的课程，
与教授的面谈 - SpeakingMax英语口语达人

This type of selective prosecution and punishment is, at best, confusing, and at worst, lacks transparency.
FORBES: Insider Trading -- Why Are Offenders Treated So Differently?