mend: implies the making whole or sound of something that is broken, torn, or injured: the wound ~ed slowly.   break断tear撕injure伤 （sound健康正常emphasizes the absence of illness, weakness, or malfunction强调没有疾病虚弱异常，如they returned safe and sound他们安全地返回毫发无损，如an examination showed his heart to be sound体检显示他心脏健康正常，还表示合理reasonable，如a sound proposal for combatting terrorism一个打击恐怖主义的合理建议，如a sound advice for healthy living对于健康生活的合理建议）  whole完整强调无缺失, 如read the whole book读完了整本书(表示一页未漏)     又如his health is mending他的健康状况正在好转，如you should mend your manners你应该改正态度，如4 Ways to Mend a Broken Relationship是4种改善关系的方法，是wikiHow上的一篇文章    


repair: applies to the mending of more extensive damage or dilapidation requiring professional skill or special equipment: the car needs to be ~ed by a mechanic.   （professional专业的;职业的implies a job that requires special training or skill需要特殊训练和技能，如professional qualifications/skills    standards/practice/footballer/ development专业资格/技能   职业标准/惯例/足球运动员/进修）   (dilapidation破旧失修to fall into decay or disrepair，如the mill was in a state of dilapidation这个磨坊一派破旧景象，如the farmhouse had fallen into a state of dilapidation农舍落到了破败的境地)


patch: implies an often temporary or hasty mending of a rent or breach with new material: ~ potholes with asphalt.   rent衣服墙面等破裂处，breach军事上的缺口 (patch本意是一小块一小片a small area of something，如the bald patch on the top of his head他头顶上的一块秃斑，如a patch of land covered in forest一小片林地，引申为衣服补丁，如jackets with patches on the elbows肘部打着补丁的夹克，在计算机上表示修补程序补丁，如follow the instructions below to download and install the patch按照下面的说明下载并安装修补程序）


rebuild: suggests the making like new of something without completely replacing it: a ~ television is cheaper than a brand-new one.  a refurbished smartphones翻新机


mend修理: 指使破损的恢复到健全状态， repair修理: 指受损破旧更严重，需要专业技能专门设备，patch修补: 指临时仓促地用新材料修补裂缝缺口，rebuild改装翻新重建: 使看上去像新的，但不替换


记忆方法: 1）首字母MRPR想成Ren Pin Ren Mai人品人脉<==不断修理    public relations公共关系     "修"的本义是1、从容装饰，精心美化，攸是悠的省略，表示缓慢从容,彡表示上色，即字面意思是细心从容地上色，如装修修饰。后引申为2、改造整治，如修改修理修补修正；还引申为3、学习，追求完善，如修身修行修养修炼；作为形容词表示"长或高"，如修长表示长，如兰亭序"此地有崇山峻岭，茂林修竹"，表示竹子高，"修短随化，终期于尽"表示寿命长

         2）修理的意思是恢复受损或有缺陷的mean to put into good order something that is injured, damaged, or defective.首字母MRPR想成Ren Pin Ren Mai人品人脉<==不断修理    (这里order表示有条理，即正常implies the state of being carefully and neatly arranged，如it was time she put her life in order她到了该好好安排自己生活的时候了）