On the other hand, the transparent linking of wired and wireless networks is an unsolved problem.

另一方面，有线和无线网络间的透明连接是一个尚未解决的问题。

youdao

The big unsolved problem is scanner technology.

还没有解决的最大问题则是扫描技术。

youdao

The origin of electrification in clouds is an old and still unsolved problem .

云中起电的缘由是一个古老但仍未解决的问题。

youdao

It was a problem left unsolved by the out-going president.

VOA: special.2009.07.30

And I can tell you from my own experience that the managers stood down our shuttle launch when they had an unsolved problem that they still had to grapple with.

NPR: Former Astronaut on NASA Risk Assessment

The big unsolved problem is scanner technology.

ECONOMIST: Bureaucracy not technology

Dr Hinton's experiments have focused on hand-written letters and numbers (handwriting recognition being a crucial, and so-far unsolved, problem in machine vision).

ECONOMIST: Machine vision