Still, it is not yet known who is behind the attacks.
然而，到目前为止，还不清楚谁指使了这两起袭击。
He says it is not yet known who was behind the bombing, but we will ultimately find out.
他说还不清楚是谁策划了这次爆炸，但我们最终会找出来。
It is not yet known what the plot will be or who will star in Angry Birds the movie but they are hoping to have it ready for release in 2015.
目前还不清楚这部根据游侠改编的电影具体有怎样的情节、将由谁配音，但公司希望能在2015年发行。
"There's a very poetic beauty in that, in that kind of urban war zone Americana that is not really known, not really talked about, not really seen, and yet it is part of the spine of America."
VOA: special.2010.06.21
And people are gonna have to learn about sablefish - which is a beautiful substitute for it, but yet it's not commonly known."
VOA: standard.2010.07.14
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