Another open question is whether these cells can actually be built; so far the powerful and efficient cellular powerhouses are only present in virtual reality.

另一个未解决的问题是：是否能够真正制造出这些电池，到目前为止，功率强而能效高的细胞发电装置还只出现在虚拟世界。

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Another open question is whether customers will plump for dedicated video communication systems over those that also serve other purposes, such as a PC or a games console.

另一个明显的问题是：是否用户将选择专用视频通信系统而忽略另外提供其他功能的设备，比如PC机或游戏面板。

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This issue also leads us to another question - should we use an open source solution or not?

这个问题也引出了另一个问题——我们是否应该使用开源软件？

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Whether men serving in the infantry will accept women as peers is another open question.

CNN: Will infantry men accept women as peers?

Whether tighter gun control is the answer is another open question and an even more difficult question is what sort of gun control would be feasible or effective.

FORBES: Killing Pixels: Why The NRA Shooting Range App Won't Make You Violent, But Neither Will 'Call Of Duty'

It remains an open question whether NATO can or should mount another such mission out of area.

ECONOMIST: The future of NATO: Fewer dragons, more snakes | The