heart and soul 一心一意
ebb and flow 人世盛衰
cloak and dagger 秘密的行动
law and order 秩序
move heaven and earth 不遗余力

part and parcel 不可或缺
pomp and ceremony 盛典
rain or shine 不论如何
rank and file 大众
(fight) tooth and nail 全力以赴

treat or trick 不给甜头就有好看的
注：万圣节里小孩挨家挨户的讨cookie，say "treat or trick"
facts and figures 确凿的事实
hugs and kisses 热情欢迎
ins and outs 来龙去脉
odds and ends 零零星星