Solving the Expression Problem makes it possible to extend preexisting types to new methods and extend preexisting methods to new types, all without recompiling existing code.

解决表达式问题使将先前存在的类型扩展到新方法成为可能，所有这些都不重新编译现有代码。

youdao

You can consider it when writing your classes to make sure that when you need to extend their behavior you don't have to change the class but to extend it.

你应该在编写类的时候考虑到它，以确保当你需要扩展它们的行为时，你不需要修改类实现，只需要扩展它。

youdao

You extend your brand with every resource you share. You extend the knowledge of your institution throughout the Internet.

分享资源的同时扩展了自己的品牌，同时又把自己的知识从网路上传了出去。

youdao

His trip would extend over more than Within a few days of the dinner party, Robert Fulton began his preparations.

VOA: special.2009.01.14

But the idea is--the clip is to make the point that the fear will extend to a rabbit, a white rabbit.

但关键是，这段影片试图说明,恐惧是会扩散到小白兔身上去的。

耶鲁公开课 - 心理学导论课程节选

There's obvious question which you can extend us to other large freshmen courses.

当然这其中也有一些问题,让我们思考能否将其他大课纳入此体系。

麻省理工公开课 - 媒体、教育、市场课程节选

We've got to extend the lead and extend it even more before we even think about protecting it.

WSJ: Bruins top Rangers 5-2 with all-out effort

So that's why he believes very strongly we ought to extend the payroll tax and extend unemployment insurance.

WHITEHOUSE: Press Briefing

The controversy is not over whether to extend them, but rather for how long to extend them and for whom.

FORBES: Tax Cut Extension Undermines Proposed Wage Freeze