Extensions are best used when you need to change core functionality of an existing Ext JS component or feature, or when you want to build a brand new component altogether.

扩展最好在您需要改变一个已有 Ext JS 功能或特性的核心功能时，或者在您想要构建一个全新的组件时使用。

youdao

Research by the World Economic Forum finds that on average 42 per cent of the "core skills" within job roles will change by 2022.

世界经济论坛的研究发现，到2022年，工作岗位中平均42%的“核心技能”将会发生变化。

youdao

And I thought deeply about this, and I concluded the worst thing that could happen is if we change our core values and let it slide.

我对此深思了一番，最后我得出结论，可能发生的最坏的事情，就是一旦我们改变了自己的核心价值然后随其自然。

youdao

In your estimation, and you don't have to go on a record, you can change your mind after leaving Inner Core.

在您的看法中，您不用将看法录下来，您可以在离开人性讲堂后改变想法。

普林斯顿公开课 - 人性课程节选

What exactly will be enhanced about multi-player and how will that change the core gameplay?

FORBES: Dark Souls PC Edition Adds New Area 'Artorias Of The Abyss' And Enhanced PvP

But what I won't do is change my core values because of politics or because of pressure.

NPR: Transcript of Presidential Debate

This is neither the time to give up, nor the time to change the core of what conservatives believe.

FORBES: The Republicans Spend $1 Billion For -- Bupkis