They marched out singly or in pairs.
他们一个一个地或成双成对地走出去。
Students worked in pairs on the project.
学生两人一组做这个项目。
He wore out two pairs of shoes last year.
去年他穿坏了两双鞋。
He programmed his computer to compare the 1,431 possible combinations of pairs in this population.
他给他的计算机编了程来比较这些人中1431种可能的成对组合。
他买了两双鞋。
他们两个共卖30双鞋。
他们都成对卖。
他们总是成对地出现。
Can you find two pairs of trainers?
你能找到两双运动鞋么？
这些鸟成双成对地飞。
筷子都是成双的。
Sometimes the pupils work in pairs.
有时学生两人一组学习。
There are five pairs to choose from.
有五双可供选择。
鞋子是成双出售的。
She knitted her son 5 pairs of socks.
她给儿子织了5双袜子。
好，那给我拿5双。
它成对出售。
The teacher lets students read the text in pairs.
老师让学生两人一组读课文。
We practiced English conversation in pairs so that both of us can make progress.
我们两人一组练习英语对话，这样我们两个人都能进步。
The elderly gravitate there, shuffling in cheerful pairs along Marine Parade or jogging in slow motion past the Sea Gull Café, intent on some distant goal.
被吸引到那里的老人们，或是成对欢愉地沿着马林百列缓步慢行，或是不紧不慢地经过海鸥咖啡店，要去往远处的某个地方。
I placed an order with them for 500 pairs of shoes.
我向他们订购了500双鞋。
How many pairs of jeans do you need?
需要多少条牛仔裤？
Looking at rising and setting star pairs is a good technique.
观察上升和下降的星对是一个很好的技巧。
Unless current greenhouse gas emissions drop, 70 percent of king penguins—1.1 million breeding pairs—will be forced to relocate their breeding grounds, or face extinction by 2100.
除非目前的温室气体排放量下降，否则70%的帝企鹅——即110万对繁殖伴侣——将被迫迁移它们的繁殖地，或者它们会在2100年前濒临灭绝。
A brief rummage will provide several pairs of gloves.
稍许翻一下就会找到几副手套。
It has three pairs of legs, each ending in a large claw.
它有3对腿，每条腿的末端都有一个大爪子。
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