Just as on smoking, voices now come from many quarters insisting that the science about global warming is incomplete, that it's OK to keep pouring fumes into the air until we know for sure.

就像吸烟一样，现在来自许多方面的声音坚持认为，有关全球变暖的科学是不完整的，在我们确定之前，继续向空气中排放烟雾是可以的。

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If you don't study hard from now on, your ambition to enter Tsinghua University will be just a castle in the air.

如果你不从现在开始就努力学习，你考进清华大学的抱负就是异想天开。

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So -let's focus our attention now on ways of controlling or reducing the amount of air pollution caused by the car.

因此，我们现在应把注意力放在控制或者减少由汽车产生的空气污染方法上来。

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Postscript: One of my former reporter colleagues, Jeffrey Brown, stuck with the show and is now on air as one of the anchors.

FORBES: Three Questions You Should Ask Before You Take The Job

Viva is now back on air.

BBC: Troops patrol Madagascar streets

Goma, on the Rwandan border, now has a direct air link, on rickety Russian planes, to Kinshasa, a journey that used to be a nightmare.

ECONOMIST: With a semblance of peace, trade is flowing again