"The key finding of this meeting is that we have up to one-meter sea-level rise by 2100, based on our new insight of glaciers.

VOA: standard.2009.03.12

That rate of rise is steeper so they--antibody levels go up more rapidly and they reach a higher level.

同时,上升速度也更加迅速,以达到更高的浓度水平

耶鲁公开课 - 生物医学工程探索课程节选

So people change-- up or down in their level of happiness is a result of their experiences.

人们的快乐水平会上下变化,这是他们的经验之谈。

哈佛公开课 - 幸福课课程节选

World Health Organization Director-General Margaret Chan said the alert level was stepped up because influenza viruses are unpredictable and can spread quickly around the world.

VOA: standard.2009.04.29

"The progress in terms of the Afghan government doing its side of the bargain and improving its level of governance isn't happening as smoothly as it should, that the build-up of the Afghan army is again slower than it should.

VOA: standard.2010.06.22