Now as I did last time, let me put in two axes to make the picture a little easier to draw.
和我上次做的一样,画两个纵轴来帮助我们作图
Let me draw a quick picture in chalk here.
我用粉笔画一个简单的图。
Excuse me. So what I'm going to do is, let's draw a picture that has S1 on the horizontal axis and S2 on the vertical axis.
好了,我们接下来来绘制图像,S1是横轴,S2是纵轴
If I told you that 'draw me a nucleotide from RNA that has ', you could go back to this picture and you could draw the whole thing.
如果让你找RNA中碱基是A的核苷酸,你可以看着这个图,就能找出其全部结构
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