An average electric bill might go up $2 or $3 per month.

一张普通电费单可能每月上涨$2或$3。

《柯林斯英汉双解大词典》

Lectures, seminars and tutorials are all one hour in length, whilst laboratory classes usually last either 2 or 3 hours.

讲座、研讨会和辅导课都是一个小时，而实验课通常持续2到3个小时。

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From his audience and analysis, he learned that only 2 or 3 of his classmates knew much of anything about geology.

从他的听众和分析报告中，他了解到，只有2到3个同学对地质学涉猎较深。

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These patients have one or two major MS-related problems every one to 3 years.

VOA: special.2009.01.06

So the 3 s 1, or any of the other electrons that are in the outer-most shell, those are what we call our valence electrons, and those are where all the excitement happens.

它们是经常发生激发情况的,那也是我们所看到，我们称之为价电子，它们是经常发生激发情况的。

麻省理工公开课 - 化学原理课程节选

So, the take-home message is whether you have three photons or 3,000,000 photons that you're shooting at your metal, if you're not at that minimum frequency or that minimum energy that you need, nothing is going to happen.

所以，这里表明的信息是,无论是向金属发射3个光子,还是300万个光子,如果没有达到所需的最低频率,或者最小能量,什么事情都不会发生。

麻省理工公开课 - 化学原理课程节选

He was a good-looking kid, 6-2 or 6-3, clear eyed, with an easy smile.

CNN: Obama: Time to reclaim America's promise

Possessing an E-2 or E-3 version of apo certainly isn't a guarantee of avoiding Alzheimer's.

WSJ: A Gene Gives a Hint Of How Long a Person Might Hope to Live

People talk about team formations, 4-4-2 or 5-3-2, but against Brazil Craig Brown will want to get 11 players behind the ball and defend.

BBC: Confidence is key for Scotland