up and down 上上下下
to and fro 往返
back and forth 前前后后
far and forth 疑有错误
far and near 四面八方
dos and don'ts 注意事项
ins and outs 复杂细节，拐角道路或小径的弯曲之处
ups and downs 盛衰，浮沉
on and off 间间断断地
more or less 或多或少
sooner or later 迟早
young and old 老老少少
day and night 日日夜夜
the haves and have-nots 穷人和富人
early and late 不分昼夜
rain or shine 不管境遇如何，风雨无阻
right or wrong 不管对错
hit or miss 不经意间，偶然命中