A pair of oxen, yoked together, was used.

　　把兩頭牛用軛套在一起使喚。

　　He wore old jeans and a pair of sneakers.

　　他穿一條舊牛仔褲，腳蹬運動(dòng)鞋。

　　The mechanic was wearing a pair of blue overalls.

　　機修工穿著(zhù)一件藍色工裝連衣褲。

　　She clamped a pair of headphones over her ears.

　　她把一副耳機戴在兩邊耳朵上。

　　Go out and buy a pair of glasses, and charge it to us

　　去買(mǎi)副眼鏡，賬記在我們頭上。