But he says only one or two students usually choose it each year, and no one did in the graduating class in May.

VOA: special.2009.07.23

You are required only to put the one or two-letter chemical abbreviation, the symbol.

你们只需要,用一两个字母来代表一个化学元素。

麻省理工公开课 - 固态化学导论课程节选

Well, it turns out that if you want to check two conditions and you only care that one of them is true or the other one is true.

好的，结果是如果你想要核对两个条件,你只关心其中一个是正确的,或另外一个是正确的。

哈佛公开课 - 计算机科学课程节选

Scientists say ninety percent of all Arctic sea ice is only one or two years old.

VOA: special.2009.05.05

I mean, you should not imagine when I say slaves--just take out of your mind the plantations of the old South, because when you only have one or two slaves, the master is working right alongside them, doing exactly the same work that they are doing, and also instructing them and telling them what's what.

我的意思是,当我们提到奴隶的时候,大家不要想当然地联想到南部种植园,因为当你只有一两个奴隶时,奴隶主必须要和奴隶一起劳作,做着和奴隶一样的农活,并且不断告诉他们要做什么

耶鲁公开课 - 古希腊历史简介课程节选

Only two areas did not have an overfishing problem in either the new study or the earlier one.

VOA: special.2009.09.08

If I'm talking about two DNA strands and they differ only in one or two base pairs they won't be exact complements and they won't form this double helix.

假设有两条DNA单链,有一两个碱基不能配对,它们就不能完全互补,也无法形成双螺旋形结构

耶鲁公开课 - 生物医学工程探索课程节选

Pittsburgh was the only one not predicting a deficit for two thousand nine or ten.

VOA: special.2009.07.13

That is,we can complete two goals with only one effort or action.

VOA: special.2009.07.26