The basic extension contains very simple elements: one word and, of course, a new synonym.

基本扩展包含非常简单的元素：一个词，当然，还有一个新的同义词。

youdao

Education, there are some very large universities of course but even the smaller colleges have the extension staff.

教育，有许多非常大的大学里当然可以，但是即使是小学院也可以扩展人员。

youdao

Unforeseen developments that become apparent only in the course of implementation may require the amendment or extension of projects.

只有在实行过程中出现未遇见的情况时才可能需要修改或扩充项目。

youdao

We have 90 extension school students who are taking the course via distance education, so we have a huge group that will be joining us at the 2010 CS50 fair and the those photos you saw a moment ago depicted 2009's.

这里有90个来自哈佛开放学院的学生,他们正在通过远程教育来学习这门课程，所以参加2010年CS50课程的团体是很庞大的,刚才你们看到的图片显示的是,2009年的数据。

哈佛公开课 - 计算机科学课程节选

The crofters were opposed to an extension of the course onto land they used for grazing livestock.

BBC: Eriskay

Just before they headed home for the winter holidays, Republicans went into duck and cover mode and Congress voted to extend the payroll tax break for two months without paying for the extension, of course.

FORBES: Payroll Tax-Cut Deal: Borrowed Money, Borrowed Time

Of course, Extension.fm backed by an elite group of investors and run by industry veterans has ambitions beyond some fraction of the 6.7% of the market that uses Chrome.

FORBES: Hot New York City Startup Extension.fm Is Built On Chrome