1. 两个字的词性相同，中间常用and, or ,nor 连接
2. 顺序不能改变
我们在这里粗分为四种类型：一般常见的名词组合、押韵的词语组合、介系词或连接词的组合、缩写组合，Ready？ Go！
类型一：一般常见的名词组合
1. peace and quiet 安静 (peace为名词，意思是和平；quiet在这里也作为名词，意思也是安静、和平)
例句：The patient needs peace and quiet. ( 病人需要安静。)
2. life and times 某人当时的生活情形
例句：I’m reading a book about the life and times of Winston Churchill. It’s fascinating.(我在阅读一本关于Winston Churchill生平的书籍，真是精彩极了！)
3. law and order 法治
例句：Law and order is necessary for a peaceful society. ( 法律和秩序是一个安宁的社会所必需的。)
4. pros and cons 有利有弊、赞成与反对
例句：What are the specific surgical options? What are the pros and cons for each? ( 有什么可以选择的特殊的手术方式？它的利与弊各是什么？)
5. chalk and cheese 天壤之别
例句：I tried, as chalk and cheese out of the translation. ( 我试过了，翻译出来牛头不对马嘴的。)
6. aches and pains 疼痛
A medical clinic serves passengers with aches and pains. ( 医疗诊所为那些身体不适的乘客提供服务。)
7. let or hindrance 阻碍、妨碍
※ let为名词，是个法律用语，意思是妨碍，阻碍
例句：The passport opened frontiers to the traveler without let or hindrance. ( 这个护照使旅行者可以无阻碍地入境。)
类型二：押韵的词语Rhyme and alliteration
1. odds and sods 零碎的事情
例句：I’ve done all the important building work; I’ve just got the odds and sods left, you know, like fitting the door handles.
2. hustle and bustle 熙熙攘攘
例句：St. Ethelburga’s Church itself is a remarkable haven of peace in the middle of the hustle and bustle of the City of London. ( 圣埃德姆德教堂本身是一个在熙熙攘攘的伦敦市中的卓越的和平的避风港。)
3. rest and relaxation 休闲放松 (也可以当缩写用！)
例句：The 23-year-old prince will now have a month of rest and relaxation before resuming his army life. ( 今年23岁的王子，将有一个月的时间休息和放松，然后恢复他的军旅生活。)
4. trials and tribulations 困难、考验
例句：After many trials and tribulations, Bill Gates went on to create, well you know, Microsoft. ( 在无数次不懈的尝试和失败后，比尔盖茨才随之创建了微软。)
类型三：组成的词汇包含介词或连接词
1. ups and downs 起起伏伏
例句：Like many, my daughter has traversed her own ups and downs as she moved into her adult years. ( 像大多数人一样，我的女儿在步入成人期时也经历了她自己的成功与失败。)
2. ins and outs 复杂细节
例句：I don’t know all the ins and outs, but it seems the Prime Minister has made a serious mistake.(我不清楚事情的细节，但首相似乎犯了很严重的错误)
3. here and there 到处
例句：However, when we reached the top, we were shocked to see litters here and there, such as bottles and banana peels. ( 然而，当我们登上山顶，被眼前的一幕惊呆了：瓶子和香蕉皮这样的废弃物到处都是。)
4. down and out 贫困潦倒的
例句：The writer was down and out, but he still went on with his writing. ( 那个作家虽然已经穷困潦倒了，但他还是继续写作。)
5. ifs and buts 借口、推托
例句：I don’t want any ifs and buts—swallow your medicine at once. ( 我不要听你的理由， 快把药吞下去。)
6. neither here nor there 与所述无关的；不相关的
例句：Now whether or not any of this is true, believe me, is neither here nor there. ( 不管这些正确与否，相信我，关键不在于此。)
类型四：缩写用法
1. R and R: rest and relaxation 放松休息
例句：Henry has been working too hard recently. He really needs some R and R. ( 亨瑞最近工作很辛苦，他真的需要放松休个假。)
2. P and P: postage and packing 邮资及包装费
例句：Did you check that the price includes P and P? ( 你有没有检查那个价格是否包含运费？)
3. R and D: research and development 通常指研发部门
例句：Relatively, Tencent is the least safe because it still has much to invest in its e-commerce division, R&D and sales and marketing. ( 相对的，腾讯是风险最大的，因为它仍需要向它的电子商务部门、研发部门和销售市场部门投入大量资金。)
