到目前止，答案一直是否定的。
现在我就可以给看你，如果你愿意看的话。到目前止，我认为它可以追溯到8代人。
I can show it to you now, if you like. I think it goes back about 8 generations so far.
物理学家恩里克·费米曾提出一个著名的问题：既然宇宙中有着海量的恒星系，其中有条件演化出生命的也为数不少，然而为什么到目前止还没有任何一个地外文明向地球人展示它们的存在？
The physicist Enrico Fermi famously asked why no extra-terrestrials have shown up on Earth when there are likely to be so many solar systems where life could have evolved.
到目前以止，我已经向大家介绍了 $()函数的三种用法。
So far, I've shown you three different ways to use the $() function.
目前的“止损”交易范围已经扩大到几乎所有资产类别，只有美元依然是投资者心目中唯一的“避风港”。
The "risk off" trade has now enveloped nearly every asset class at this point, leaving just the U. S. dollar as the world's sole safe haven investment.
到六月三日止，猪流感已经触及到所有世卫组织分区，目前已经涉及74个国家。
By 3 June, swine flu had reached every WHO region, and it has now been detected in 74 countries.
到六月三日止，猪流感已经触及到所有世卫组织分区，目前已经涉及74个国家。
By 3 June, swine flu had reached every WHO region, and it has now been detected in 74 countries.
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