The more important goal is using interactive learning to discover the cause of the decline and compare it to issues we face today—natural disasters, environmental problems, and war.
更重要的目标是利用互动式学习来发现减少的原因,并将其与我们今天面临的问题——自然灾害、环境问题和战争——进行比较。
Today we face seeming challenges in energy, the environment, health care.
今天,我们似乎面临着能源、环境和医疗保健方面的挑战。
"Today I say to you that the challenges we face are real, they are serious and they are many.
VOA: special.2010.01.23
Today we tell about female scientists around the world and some of the problems they face.
VOA: special.2009.05.13
"Today,in the face of violence from those who would only destroy, Iraqis took a step forward in the hard work of building up their country.
VOA: special.2010.03.13
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