Change is inevitable, by definition, in a dynamic marketplace, and those who refuse to adapt will get left behind.

变化也是不可避免的，通过解释说明，在动态市场中，那些拒绝采纳的人将会落后。

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In other words, while not minimizing the scope of the problem, Friedman notes that any small change in its definition can have profound consequences in the number of people who are considered obese.

他解释道，肥胖症是个“出发点”问题，也就是说，在不缩小问题范围情况下，对肥胖定义的丝毫的改变都会极大影响肥胖人口的数量统计。

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This is a sea change in job definition.

这是职业定义的巨大变化。

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I know it looks like a simple and silly little example, but at the moment, I still have the ability to go in and change the values of the parameters by that little definition.

很简单的有点儿蠢的例子,但是现在，我还是可以通过，一个简单的定义声明，来进去改变参数的值,这样就没意义了,这是因为我并没有用一些。

麻省理工公开课 - 计算机科学及编程导论课程节选

Another way of saying it is, anything that uses get float doesn't care what the details are inside or shouldn't, and if I change that definition, I don't have to change anything elsewhere in my code, whereas if I just have the raw code in there, I have to go off and do it.

换种说法就是，任何用到获取,输入这个功能的人不用担心具体的实现细节,如果我改变了这里的实现，我并不需要去改变我的代码,因为我的最底处的源码就在这里,我去改这里就可以了。

麻省理工公开课 - 计算机科学及编程导论课程节选

The most likely explanation for this is a change in the definition of the disease.

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Already there is enormous anxiety among gay-rights activists over which vehicle is better, whether the Court is ready to make this profound change in the definition of marriage, and whether, even if the Court allows gay marriage, it will launch a national backlash that will end up curbing gay progress in America in the long run.

NEWYORKER: Extreme Makeover

Ahead of that debate last October, the Presbyterian church wrote to all assembly members stating its opposition to any change in the legal definition of marriage.

BBC: Churches plea over same-sex marriage motion