I packed some books, a camera, 4 shirts, 2 pairs of pants, a coat, gloves, 2 pairs of walking shoes, and some candies.

我带了一些书，一个相机，4件衬衫，2条裤子，一件外套，手套，2双步行鞋，和一些糖果。

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Adopts 2pairs of brushes, 2 pairs of water dip rolls, fully guarantees the glass washing effect.

采用2对毛刷，2对蘸水辊，充份保证玻璃清洗效果。

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Objectives: Genotype phenotype correlation in 2 pairs of monozygotic twins with ARVC and the role of environmental factors are analyzed.

目的：在两对ARVC单卵双生子中分析基因型与表型的相关性以及环境因素的作用。

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And then the number of pairs at month n is the number of pairs at month n - 1 plus the number of pairs at month n - 2.

我们让第一个月的兔子数是1对,第n个月的兔子对数,是第n-1个月的兔子对数。

麻省理工公开课 - 计算机科学及编程导论课程节选