Where did the H5N1 virus come from and where is it now?

H5N1病毒从哪里的？现在分布在哪里？

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The southern frontier of the desert was far to the north of where it is now, while semiarid grassland and shallow freshwater lakes covered much of what are now arid plains.

过往沙漠的南部边界比现在的边界更靠北，而半干旱的草原和较浅的淡水湖泊覆盖了现在干旱平原的大部分地区。

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It has now reached a point where a growing number of people believe that it is far too high, and that bringing it down will be one of the great challenges of the twenty first century.

现在，到了越来越多人认为它太高了的程度，而且使它降低将是21世纪最大的挑战之一。

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And of course I want to go to Afghanistan, now it's where all the action is."

VOA: standard.2010.04.06

Phoenicia was located where Lebanon is now, and it goes back to maybe the tenth century, maybe the ninth, and it was powerful.

腓尼基就位于现在的黎巴嫩,在公元前十世纪,或许是九世纪,腓尼基实力强大

耶鲁公开课 - 古希腊历史简介课程节选

So now that means if this is where the center of positive excess charge lies and on top of it is the center there is no displacement of the charge so there is no net dipole.

所以现在我们说,如果正电荷中心,就位于,那么还是在这里负电荷中心也在这里,所以没有空间偶极。

麻省理工公开课 - 固态化学导论课程节选

The fact that it's here means that somewhere between where it started and where it is now there's a molecule with the right vibrational frequency'.

BBC: Quantum physics explanation for smell gains traction

We've really peeled the onion and it is so powerful, and now it is getting us to a place where we are ready to have this more sophisticated conversation of what we are going to do about it.

FORBES: Magazine Article

The new pontiff faces the challenge of reviving Catholicism in former church strongholds in Europe and parts of Latin America where it is now in decline, ministering to growing congregations in Africa and Asia and inspiring the church's priests, monks and nuns.

WSJ: Pope Celebrates Inaugural Mass