系统现在还未升级。

It has not been improved yet.

youdao

警察到现在还未获得一点线索。

The police haven't got a single lead yet.

youdao

他一小时以前就出发去工作了，现在还未到吗？

He started out for work one hour ago, hasn't he arrived yet?

youdao

It's not done in time for you to read but I think I will have it done at some time during this semester.

但现在还无法读到,因为还未完成,但是我想这学期会完成这本书

耶鲁公开课 - 金融市场课程节选