现在我们来到了学校的正大门。

Now we are in the front gate.

youdao

现在我们来到大英博物馆的门口了。

Here we are at the entrance of the British Museum.

youdao

现在我们来到公园里的一个小动物园里。

Now we came to a small zoo in the park.

youdao

The government comes to the bank and says it's a war we need the money.

政府来到中央银行说,现在是战争时期，我们需要钱。

耶鲁公开课 - 金融市场课程节选

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

So if we write the electron configuration you see that this is the electron configuration here, 1s22s22p 1 s 2, 2 s 2, 2 p 6, 3s1 and now we're going into that third shell 3 s 1.

现在我们来到第三层,你们会看到3s1价电子之间的区别，电子构型是，现在我们来到第三层。

麻省理工公开课 - 化学原理课程节选