It's about three meters long, and it took about four years to develop the model.
它大约有三米长,开发这个模型花了大约四年的时间。
A new study used a computer model to predict how just three grams less a day would affect heart disease in the United States.
VOA: special.2010.01.27
Scholars have proposed three possible models to explain the formation of Israel. The first is an immigration model.
学者们提出了三种可能的模型,来解释以色列的形成,第一种是移民模式。
The way we solved that Cournot model was we did three kinds of things.
我们通过三个方法,解决那个古诺模型
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