Not very clear so far.

迄今不甚清楚。

youdao

What's clear so far is that Stuxnet was written to attack an industrial control system, such as those used for gas pipelines and power plants.

迄今为止，我们所明白的是，Stuxnet的开发是为了袭击一个工业控制系统，比如用来控制石油管道和电力设备的系统。

youdao

Outlawing the payment of ransoms seems unfeasible unless there is clear evidence (none exists so far) that some of the money is finding its way into terrorist hands.

除非找到赎金到了海盗手里的明确证据(至今还未找到)，那就不能将支付赎金定位非法化。

youdao

"(It's) not clear so far whether Apple's new textbooks will be open formats (ePub etc.) or only in Apple format, " Mathew Ingram, a senior writer for the blog GigaOm, posted on Twitter after the event.

CNN: Apple: School should center on the iPad

So far so clear, but what's far from obvious is whether this is merely the sort of mid- term punishment from which both Mr Blair's and Mrs Thatcher's governments recovered easily.

BBC: Vote 2012: What were the people saying?

So far, so clear: Mr Obama may attack if we proceed towards nuclear weapons.

ECONOMIST: Lexington