Since we don t have a complete understanding of string theory, it s impossible to rule out all possible models that are based on strings, said Rothstein.
罗斯丁说，“由于我们没有完全理解弦理论，因此不能排除基于弦的各种可能模式。”
It 's impossible to focus on studying if you have all sorts of negative ideas about studying.
如果你对学习有很多消极思想，就不可能把注意力集中在学习上。
It "s impossible to reply to your vague inquiry."
我们无法答复你的模糊询盘。
It "s impossible to reply to your vague inquiry."
我们无法答复你的模糊询盘。
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