heart and soul 一心一意
ebb and flow 人世盛衰
cloak and dagger 秘密的行动
rain or shine 不论如何
rank and file 大众
(fight) tooth and nail 全力以赴
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
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"
ins and outs 来龙去脉
odds and ends 零零星星
facts and figures 确凿的事实
hugs and kisses 热情欢迎
