1. But my sister bought this pair last month.
    但是，我姐姐上个月买到了这样的一双。

2. But not one pair of eyes strayed from the history books which twenty-five little girls were studying so earnestly.
    25个小女孩正在认真地学习历史，没有一双眼睛离开课本。

3. But the next day in Leohmann's, on sale yet, I find a pair that are just as good.
    但是次日在利奥哈曼百货商店里，我找到了一双虽说是削价货、但质地不错的高跟鞋。

4. But the Buffalo nickel, produced from 1913 to 1938, honored a pair of connected tragedies from the settlement of the American frontier — the destruction of the buffalo herds and the American Indians.
    但1913至1938年间发行的野牛硬币，却是为了纪念由美国拓居引起的两起相互关联的悲剧--野牛群的灭绝和美洲印第安人的毁灭。

5. Like the cooling of a hot kettle or the wearing-out of a pair of shoes.
    就像一壶热水迟早会凉不来，一双鞋渐渐会磨破一样。

6. Two widely separated strings hang from a ceiling. Even though you can't reach both at once, is it possible to tie their ends together, using only a pair of pliers?
    两根相距甚远的绳子分别从天花板上垂下来。尽管你无法同时够到两根绳子，但有没有可能只用一把钳子就把两根绳子系到一起呢？

7. That way, any pair of shoes could have its own secret sum of money.
    这样，任何一双鞋子都可以有自己的"私房钱"。

8. Keep a pair of heavy, comfortable shoes or boots in your home, at work, and in your vehicle.
    在住处、工作场所和汽车里放一双厚重、舒适的鞋或靴子。

9. He could make out three men in a basket under it and one of them was holding a pair of binoculars.
    他看清了气球下面有3个人呆在一只筐里，其中一个举着望远镜。

10. And if a single curved glass would distort nature, how much more would a pair of them?
    何况一片曲面镜就可歪曲自然，那么伽利略的两片曲面镜对自然的歪曲又该多大呢？