While black carbon particles tend to settle over time and do not have the global reach of greenhouse gases, they do travel, scientists now realize.

当黑炭颗粒随着时间漫延，它们不象温室气体那样有着全球性的分步，科学家们发现它们会漂移。

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It is an old issue that returns each winter as the cities’ furnaces roar back into use to deliver central heating, and temperature inversions settle over the North.

其实，这是每个冬天的老话题了，随着北方温度快速下降，锅炉就会投入使用给城市供暖。

youdao

A few hours later, when she came to say goodbye, the family asked her to settle an argument they've been having over exactly what advice she had given.

几个小时后，当她来告别时，家人要求她解决他们一直在争论的问题，即她到底给了什么建议。

youdao

The public saw the elections as a sign of hope that reasonable people might find a way to settle the bitter dispute over slavery.

VOA: special.2009.06.18

But northern and southern leaders could not settle their dispute over slavery.

VOA: special.2009.03.05

That compromise helped settle a dispute over slavery and the western territories.

VOA: special.2009.04.16

The study did not clarify whether the babies' stress levels lowered as their sleep patterns settle over time.

CNN: Should babies be allowed to 'cry it out'?

Outside the hotel, dusk began to settle over Central Park, and lights flickered on in the buildings across Columbus Circle.

NEWYORKER: Reversal of Fortune

They have the right to enter France without a visa but must have work or residency permits to settle over the long-term.

BBC: France rounds up hundreds of Roma