"Is-A" refers to the "one" of one class and belongs to another class, while "Has-A" is different, which indicates that a certain role has a certain responsibility. A common reason for the wrong use of inheritance instead of aggregation is to mistakenly treat "Has-A" as "Is-A". For example:
Attacking TCP Connections
事业知音难觅，生活中同样。虽然她和小县城的几位男人都有过瓜葛，但是爱她的人她不爱，唯一一次付出的真情，却是落花有意，流水无情。绝望的王彩玲甚至想到了以死了结。
文森特受雇于一家跨国贩毒集团，这晚来到洛杉矶要干掉五名重要证人。他与我们经常看到的杀手大不一样，他天生喜欢唠叨，在他挟持麦克斯去帮他完成杀人工作时，还振振有词――“我又不是卢旺达大屠杀，我杀人本来就不是好人，可以说是替天行道，你有什么可以指责我的？”麦克斯也一时语塞。
唯有善人才能得到福报，唯有勤劳诚实的人才能真正发财致富。财神带着招哥宝妹出到人间，为笨人王七和精明人沈贵谁能发财致富打赌决胜。笨人王七以诚实的经商作风令生意蒸蒸日上，最终赢得了胜利。金钱和权利的力量都是有限的，唯有真诚的爱才是最大的力量。财神三神在人间遇到借妃之名横征暴敛逼迫知府小姐小玉成婚的九王爷，财神与九王爷开始了金钱与权利的较量。财神与小玉患难与共，小玉以生命助财神重返天庭战胜了九王爷。金钱不仅使穷人变富，富人变穷，甚至能改变人的做人原则。财神帮助穷秀才买官并使富商雷老虎破产，此举令穷秀才与雷老虎都判若两人。有权有势的秀才开始敛财作恶，潦倒的雷老虎却良心发现，并与宝妹有了一段人神之恋。金钱会与道义错位，与物欲发生冲突，与情感相背离。河桥镇药铺大夫叶美文经不起金钱的诱惑，弃有生孕在身的丫鬟环儿与富家小姐成婚。财神请大富翁苏玉环帮助河桥镇致富。苏玉环的条件是要叶美文一条命。
既然太祖皇帝当初能打下一座江山，你是他的子孙，为何就不能呢？我姑姑说，外面世界大的很。
Let's conclude
意料之中的胜利，但是结果确实有些出乎意料。
众人便看着那个年轻小将迈着虎步走向黎水，神情十分淡然，毫不紧张匆忙，也无责怪弟弟的意思。
板栗等会过来，这一块由他张罗。
汪直闭目不言。
Recipient of the 2007 Golden Globe Award for Best Drama Television Series and multiple Emmy nominations, including Outstanding Drama Series for the past two years, "Grey's Anatomy" returns to the ABC Television Network for its fifth season.Is "happily ever after" possible for Meredith Grey and Derek "McDreamy" Shepherd? With Meredith experiencing a breakthrough in therapy - the realization that she and Derek can be extraordinary together, rather than ordinary apart -- she and Derek now face the highs and lows of being a committed couple.Continuing their first year as residents at Seattle Grace Hospital, Meredith, Cristina Yang, Izzie Stevens and Alex Karev have interns of their own to mentor, including Meredith's half-sister, Lexie Grey. Lexie has become a roommate and confidante to George O'Malley, who, after divorce with Callie, a breakup with Izzie, and learning that he failed his residency test by only one point, is striving to get both his professional and personal life back on track.After attending to his girlfriend Rebecca's mental illness on his own, and revealing that he had gone through this with his own mother, Alex finds solace in Izzie's arms. Alex must continue through this difficult time, whether or not Izzie remains by his side.Cristina, having finally won out over her tough-as-nails mentor, Erica, is back on track as a surgeon - but is there a chance for new love in her life as well?With the encouragement of Mark "McSteamy" Sloan, Dr. Callie Torres has taken a chance on love with cardiothoracic surgeon, Erica Hahn; now, she and Erica must figure out what happens after the first kiss.Overseeing the residents is the no-nonsense Chief Resident, Miranda Bailey. Facing marital troubles and the difficulty of balancing her work and personal life, Bailey has handed her responsibilities as head of the free clinic over to Izzie. Also striving for balance is Chief of Surgery, Richard Webber, who has reunited with his estranged wife, Adele.The doctors of Seattle Grace Hospital deal with life-or-death consequences on a daily basis - it's in one another that they find comfort, friendship and love. Together they're discovering that neither medicine nor relationships can be defined in black and white. Real life only comes in shades of grey."Grey's Anatomy" stars Ellen Pompeo as Meredith Grey, Patrick Dempsey as Derek Shepherd, Sandra Oh as Cristina Yang, Katherine Heigl as Isobel "Izzie" Stevens, Justin Chambers as Alex Karev, T.R. Knight as George O'Malley, Chandra Wilson as Miranda Bailey, James Pickens, Jr. as Richard Webber, Sara Ramirez as Callie Torres, Eric Dane as Mark Sloan, Chyler Leigh as Lexie Grey, and Brooke Smith as Erica Hahn.
快去跟你娘说，晌午要把那些菜都做了，让他们兄弟们姊妹们好好吃一顿。
而高中入学前的两个人——伊理户水斗和绫井结女以意想不到的形式重逢。
黄豆鼓着腮帮子，翻眼瞪了板栗表哥好一会，却没跟往常那样跳脚大嚷，而是用手肘撑着桌面，小拳头顶着下巴，陷入沉思。
洪霖看着这个小小的少女，头上梳着百合髻，只插一根银簪，另有几根鹅黄丝带垂在耳边。
一次偶然中，奥利弗被警察逮捕，所幸得到了好心的老先生布莱罗（亨利·斯蒂芬森 Henry Stephenson 饰）收留，一辈子颠沛流离的奥利佛总算体会到了家的滋味。不幸的是，扒手团伙却不愿意放过奥利弗，他们绑架了他，其中，一个名叫南希（Kay Walsh 饰）的女孩对奥利弗心生恻隐，她决定不惜违抗老大的命令，尽自己所能帮助这个可怜的孩子。
(to be continued)
两小无猜的江百合与黎明朗即将订婚。作为之江市江、黎两大企业的继承人，他们童话般的结合却因一场突如其来的大火产生了变数。百合痛失亲人，江氏企业也饱受打击。黎明朗的母亲刘芬芳想要取消订婚，但于心不忍的明朗却坚决的把百合带回了家。刘芬芳冷冰冰的态度被明朗的秘书宁夏看在眼里，一直暗恋明朗的她决定抓住机会为自己争取幸福。但百合与明朗的感情却在朝夕相处中不断升华，百合在明朗的开导下，重燃生活的信心和勇气。明朗正式向百合求婚。宁夏安排寻女心切的赵红花进入黎家使坏，导致在百合与明朗的女儿云朵三岁生日那天，家中突生变故。伤心的百合带女儿远走云山乡村支教，与一直默默照顾她们的宁雨轩保持着纯洁的友谊。明朗历尽艰辛，在幡然悔悟的宁夏的帮助下，终于迎回百合母女。
