Tuesday was like any other day for Morgan Bailey, It was the fourth period, and she was the first student to arrive in the gym for her class.

对摩根·贝利来说，周二和往常一样，是第四节课，她是第一个到体育馆上课的学生。

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Our class met at fourth period, just after lunch.

我们的课排在第四节，就在午饭后。

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The next day I wanted to run to fourth period class, but I didn't.

第二天，我真想飞奔去第四堂课的上课教室，但我没有。

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Last week,W.W.E.officials reported the company earned more than one hundred seventeen million dollars in the fourth financial period of last year.

VOA: special.2010.02.19

s1 So for the fourth period, now we're into the 4 s 1 3d for potassium here. And what we notice when we get to the third element in 4s2 and the fourth period is 3d that we go 4 s 2 and then we're back to the 3 d's.

对于第四周期到现在我们来到钾的1,然后我们返回到,我们注意到当我们看到第三个元素,第四周期我们来到,然后我们返回到。

麻省理工公开课 - 化学原理课程节选

Now we can think about the fourth period, and the fourth period is where we start to run into some exceptions, so this is where things get a teeny bit more complicated, but you just need to remember the exceptions and then you should be OK, no matter what you're asked to write.

现在我们可以考虑第四周期，而且在第四周期,我们会遇上一些特例，所以事情有,一点复杂，但是你只需要记住,这些特例然后就没有问题了，无论你被要求写什么。

麻省理工公开课 - 化学原理课程节选

Kids that would get to fourth period and leave and go home.

BBC: News | NEWSNIGHT | Military academies transcript

The fourth period belonged to the Knicks after they broke a 72-all tie on Chris Copeland's basket, which kicked off a 19-5 run.

WSJ: Anthony scores 40, Knicks win 10th straight

Utah's big man had a season-high 32 points, going 4 of 4 in the third, then scoring the first eight in the fourth period to give the Jazz a 77-73 lead.

NPR: Boozer's Big Fourth Lifts Bulls Over Jazz