"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:
久未出发的花少家族，以时下备受大众喜爱的露营形式，去开启两个省份为期约15天的全新之旅，共计去到5个露营点，开启每个地方为期3天2夜的露营生活。花少家族在有限的生活物资、有限的户外经验的迹情况下，每个地点、每次出发都将会是一次全新的体验。
危难之间，空军涌现了一大批充满斗志的年轻飞行员——高云天、刘长岭。在一次次的空战中，他们以弱胜强，用不屈的斗志和日本空军进行殊死搏斗。一寸山河一寸血，然而就在这样恶劣的环境下，有一丛爱火悄然燃烧。飞行中队长刘长岭爱上了情报处的马昕蓝上尉。然而他不知道马昕蓝是个中共地下党。
韩平、叶红、文安三位刚刚步入社会生活的都市女性的事业、爱情、身世之谜诸方面的矛盾纠葛为主线，心充满机遇而又潜伏风险的现代都市生活为背景，反映她们的奋斗与失落、欢乐与感情，借以勾勒当代女性全新的生活理念与追求，在他们不同命运的轨迹中，伴随着各色各样的人物的渐次登场，展示了一幅幅色彩斑斓的当代都市生活的图景。同时，也表现了这种生活的丰富以及当代女性复杂的精神世界。
天生之子（郑伊健）自幼居于山中。一日，义救女子林朝英（梁佩玲），朝英却误会为其轻薄，欲杀之泄愤。幸金国世子完颜峰（罗嘉良）相救，两人互相仰慕，义为结拜，峰更代他取名重阳。
Before performing an SSL data transfer, Both sides of the communication must first shake hands with SSL, The encryption algorithm has been negotiated to exchange the encryption key, Perform identity authentication, Normally, This SSl handshake process only needs to be performed once, But there is a Regegotiation option in the SSL protocol, It allows renegotiation of the secret key to create a new key, The attacker repeatedly carries out the key renegotiation process, and the key renegotiation process requires the server to invest 15 times more CPU computing resources than the client. In addition, even if the server does not support Renegotiation, the attacker can still create similar attack effects by opening a new SSL connection separately.
……这天，陈启发了一个帖子。
The above example is a fact verified by writing code. As for the reasons, it will be analyzed in detail in this article. Here, it is only to illustrate that the above points need to be considered.
1800年前，人类恶念凝聚而成的怪物—八歧大蛇肆虐人间，被以草薙家族为首的武术家们用三件神器封印。 现代，世界综合格斗大赛 - THE KING OF FIGHTERS（简称KOF）召开，全世界的格斗高手集聚南镇。草薙家族的传人-草薙京来到南镇之后，他敏锐地感觉到了大蛇之力的复苏，一切迹象表明KOF大赛背后隐藏着一个巨大的阴谋。
Not only did I hear the voice, Almost half of the entire position 149 heard it, Then the position was bombed, The soldiers all took up their weapons and held the horses and bees in the air desperately to "hug the fire" (note: meaning to pull the trigger and fire), Even if there are some comrades who did not hear the cry of "fight", When they saw others firing, they followed suit. Those big wasps are abundant, Flying densely and bulky, So when we started shooting, The shooting rate is quite high, After the sound of the gun became one, it gradually became equal to the "buzzing" sound. No one can beat anyone, It feels strange that the two sounds are mixed together. Now that I think about it, It's like a rock band playing "heavy metal" (here "heavy metal" is a genre of rock music, Before the 1970s, This rock style is called 'hard rock', It was later renamed 'heavy metal', Of course, this is one of the more well-recognized explanations about the origin of the "heavy metal" genre of rock music. There are several other different explanations, As it is not relevant to this article, It will not be discussed in detail here), Then they gathered fire and shot for more than ten seconds. The left and right sides of the position were covered with the smashed bodies of this big wasp like rain. But then the bullets hit them more and more scattered in the air, finally forming a "circle", covering the whole position under, and then one by one dive to the ground, although they scattered, but in this way their distribution area is wider, and the spacing is widened, not as dense as before, plus flying fast,
张家被抄家那会儿，咱靖国才打仗哩。
徐立功表示，现在关于婆媳的电视剧很多，他们之间的矛盾冲突都非常大，所以大家都爱看，的确这样的片子很好看，但是没有新意的角度剖析婆媳之间为什么会如此永无止境的“斗”。
18岁的平凡女生杉菜考入理想大学却与同学们格格不入。学校里有四个外形阳光帅气，家境富裕的学生：道明寺，花泽类，西门和美作。仗义的杉菜与道明寺产生了争执，两人的误会加深。但杉菜凭借其杂草般顽强的生命力逐渐改变了这四个男生对其不好的印象，道明寺也因为在恶作剧杉菜的过程中爱上了杉菜......
钱明眼珠一转，忙上前赔笑道：将军，咱们还要回去拜祭何老将军呢。
ViuTV劇集獲不少好評，新開拍的《熟女強人》吸引產後復出的無綫視后胡杏兒倒戈助陣，同劇還有已離巢的沈卓盈、影后吳家麗、傅穎、吳千語、陸詩韻及何佩瑜等，演繹7個時代女性的故事。 監製伍健雄在社交網表示早前因劇集《歡樂頌》，令他想到時下女性面對好多問題，經過與編劇們開會後，定下7個主題，包括「雪卵」、「爭撫養權」、「同性戀」、「性上癮」、「換妻」、「爸爸去哪兒」及「脫單」，再將7個故事連成一條大故事線，人物角色穿插互動。
