We don t know what will happen tomorrow.
我们不知道明天会发生什么。
In fact, scientists don? T know what it is.
实际上,连科学家们都不知道暗物质究竟是什么。
No, I 'm sorry, I don' t know what time it will finish.
不,对不起,我不知道会议什么时候结束。
"Of course,we don't know what doses they've received, but the only persons at risk of acute radiation effects are the workers."
VOA: special.2011.03.16
if we can't think what system it belongs to, that's tantamount to saying we really don't know what it is.
我们就不知道它从属于哪个符号系统,我们就不能认识它了。
because there's, I don't know what to say, over 50, 60 colleges, you know, that are recognizable in California
因为在加州有,我不知道怎么说,有五六十多所众所周知的大学,
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