Toward the end of third period, the principal came to my room.

第三学期末，校长走进我的教室。

youdao

So if we're talking about the third period, that starts with sodium and it goes all the way up to argon.

所以如果我们谈论第3个周期，它从钠开始，一直到氩。

youdao

The month before, in February, Amy had scored a hat trick in the ice hockey game against St. Francis and then, in the third period, broken her nose.

上个月，2月的时候，艾米在对圣弗朗西斯的冰球赛里，上演了帽子戏法，之后，在第三节，被打折了鼻骨。

youdao

Late arrivals to first period fell by a third.

VOA: special.2010.10.07

So if we're talking about the third period, that starts with sodium and it goes all the way up to argon.

所以如果我们谈论第3个周期，它从钠开始,一直到氩。

麻省理工公开课 - 化学原理课程节选

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

Daniel Ciampini completed the rout with a power-play goal at 5:19 of the third period.

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Sabres coach Ron Rolston disclosed after the game that Enroth was cramping the entire third period.

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