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is a

网络一个；关系；类继承

is a

网络释义

is a

一个

抽象类表示“是一个（IS-A）”关系的抽象，接口表示“能（CAN-DO）”关系的抽象。请照例将上面的大声话朗读十遍。

关系

IDEF1x语义建模方法及其在数据库设计中的应用... ... Generic Entity 一般实体 IS-A 关系 Subtype Entity 子实体 ...

类继承

public abstract class Decorator : Tank //Do As，接口继承，不是类继承（Is-A）。这里不是Is-A的关系

一种

奶牛是一种（IS-A）陆地动物。

继承关系

用继承

...ce", 尽量使用合成/聚合(Has-A)，而不是用继承(Is-A)。

类间

接口表述的是“我能做（CAN-DO），抽象类更多的是定义在一系列紧密相关的类间（IS-A），而接口大多数是关系疏松但都实 …

是什么

注意你并没有定义一个“是什么”（IS-A）关系。这儿并没有“雇员”（“Employee”）基本类型；也不需要。

例句：

A stock market bottom is a trend reversal - the end of a market downturn and the beginning of an upward moving trend .

A股市场底部是一种趋势逆转 -结束了市场低迷的开始向上移动的趋势。

I realize this "Part II" is a bit late , but , due to my exams last month, I was unable to find the time to set up a testing machine .

我意识到 “第二部分 ”有点晚了，但是由于上个月的考试，我没能腾出时间配置测试机器。

China with an annual per capita income of over $1000 is a middle income country though it was a low income country just a few years ago .

中国年度人均收入超过 $1000 已是中等收入的国家，尽管前几年还是低收入国家。

The fact that the medical -industrial complex is trying to shape health care reform rather than block it is a tremendously good omen .

现在的事实是，医疗 -产业联合体正在支持而不是破坏医改，这是个非常好的兆头。

Considering Diablo 3 is a fast-paced game , how much lore is the Blizzard team planning to put in?

考虑到 Diablo3 是一个快流程游戏，Blizzard 的团队打算添加多少传说呢？

The design is a bit adventurous , and for the most part , it works , but it has a few major problems .

这种设计有点冒险，大部分渐变式有用的，但还是存在一些问题。

a man is a man until the day he dies , but a woman is only a woman as ling as she can .

男人至死都是男人，而女人只有在具备某种能力时才是女人。

Draco : What she needs is a man. . . to *dominate * her! To make love to her enough to make her love him! B man like you!

德拉古：她需要一个男人，去占有她，去和她做爱而让她爱上他！一个像你一样的男人！

For banks , velocity of equity -- how much revenue is generated per dollar of equity -- is a useful measure .

对银行来说，资产周转率 --每一美元的资产带来多少收入 --这是一个有用的度量。

That this is a correct theory we are not prepared to maintain , yet certain facts deserve mention which might seem to support it.

我们不打算认为这个理论正确，但某些支持这个理论的事实却值得注意。

The optimization of the capital structure of listed company is a very important thing to the company all over the world .

实现上市公司资本结构优化是国内外上市公司发展必须解决的核心课题，受到国内外学者的长期关注。

Software is a form of intellectual property and is entitled to just as much protection as real property like your car or your home .

软件是知识产权的一种形式，而且应该受到和你的不动产，如汽车或者房子等一样的保护。

it is a chronic skin disease and the priest shall pronounce him unclean . He is not to put him in isolation , because he is already unclean .

这是肉皮上的旧大痳风。祭司要定他为不洁净，不用将他关锁，因为他是不洁净了。

Human body is a very delicate "machine" and just like any other machines the body it self needs to be maintain in a good condition .

我们的身体就是一个 “精密的机器 ”而且他就像所有的机器一样，必须保持在一个良好的状态。

Once upon a time , its lese-majeste would have got them all bundled into the Tower of London , not least because one of them is a woman .

从前，冒犯君主罪会让他们全都被塞进伦敦塔，这不仅仅因为其中一位是女人。

The fact that she is a woman does not guarantee anything , but is nothing negative , either, I have hope that she would do a good job .

她是女性的事实无法担保任何事情，但也同样没有任何负面因素 .我希望她会干的很出色。

This is a bit of a different approach from my last trip since I honestly have no idea when I'm actually coming back "home . "

这和我最近一次旅途有所不同。事实上，我并不知道我什么时候能回 “家 ”。

The other is a so-called "survey perspective " , which gives directions as if looking down upon a map .

另一种方法是所谓的 “俯瞰视角 ”，就如看着一张地图。

Scott , a National Rosicrucian Lecturer , writes that the Bible is a spiritual book and must be read with the heart as well as with the mind .

斯科特，全国玫瑰十字会会员讲师写道，圣经是一种精神的书，必须读的心，以及与心灵。

Whether or not you think it 's neglect is a different matter : a Newsvine poll posted on Thursday is split almost down the middle.

你是否认为这是不作为是另一回事：周四进行的 Newsvine 调查结果几乎一分两半。

Saying a group of porcupines is a boar , the body is long to stab of that kind of boar, everyone is crowded to together pass the winter .

说有一群豪猪，就是野猪啊，身上长刺的那种野猪，大家挤在一起过冬。

You thought that now have how much person at is a small bottle water but try very hard to .

你想过现在有多少人在为一小瓶水而拼命吗。

is a

is a

一个

关系

类继承

一种

继承关系

用继承

类间

是什么

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