in a pair

基本解释

Invest in a pair of nose hairs trimmers or tweezers and make sure you always keep those puppies where they should be - in your nose!
买一副鼻毛修剪器或者小镊子可以确保让你的“小宠物”呆在属于它自己的地方——你的鼻子里。
In a pair of two-week voyages, underwater robots will take three-dimensional sonar and video images of the bow, stern and debris field from the wreck.
在为期两周的科考活动中，水下机器人将用三维声纳设备和视频图像设备对残骸船体和残骸区域的碎片进行探测。
But when they are off key or sing at the wrong pitch, the device will exaggerate their mistake so that they can hear it in a pair of earphones they are wearing.
但是，当他们跑调或唱错音高时，这个设备就会放大他们的错误，这样他们就能从自己戴着的耳机中听到了。

Then the old man and woman held the rain babies in the palms of their hands or they rocked them to sleep in a pair of wooden shoes.
At every instant, it's got a location given by the vector R; R itself is contained in a pair of numbers, x and y, and they vary with time.
在每一个瞬时,它的位置由位矢 R 给出,R 本身包含了一对坐标值 x 和 y,并且它们都随着时间的变化而变化
耶鲁公开课 - 基础物理课程节选
So in terms of nitrogen that starts off with a valence number of 5, again we have 2 lone pair electrons in the nitrogen, and again, we have 6 electrons that are shared.
对于氮来说,我们应该从五个价电子开始，同样，氮也有两个孤对电子，共用电子的个数也一样，是六个。
麻省理工公开课 - 化学原理课程节选

Now dress a synfuel subsidy in a pair of overalls and you have something irresistible to a politician.
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