back and forth前后

bed and breakfast食宿

cap and gown(coat)衣帽

fire and water水火

flesh and blood骨肉

heat and cold冷热

heavy and light轻重

iron and steel钢铁

land and water水陆

love and money金钱与爱情

might and main主力

night and day白昼

north and south南北

off and on开关

old and grey苍老

old and new新旧

one and only

pen and paper纸和笔

rain or shine阴晴

rich and poor,穷富

right and left左右

sword and shield剑与盾

twos and threes三三两两

you and I你我

young and old老少

pin and needle针毯

part and parcel重要部分

give and take合作与让步

mock and satire 讽刺嘲笑

rain and wind 风雨

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