All right. So, we'll stop here today.
好了,今天就讲到这里。
So now in this problem, we can do something slightly different, and let's use this expression here,and I will do that, then I'll stop for today.
对于这个问题,我们可以稍微做点变化,让我们用这个式子,就是这样,今天就讲到到这里
Now I'm going to stop there.
今天就讲到这里。
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